Some meteorologists prefer the hectopascal (hPa) for atmospheric air pressure, which is equivalent to the older unit millibar (mbar). Similar pressures are given in kilopascals (kPa) in most other fields, where the hecto prefix is rarely used. The unit inch of mercury (inHg, see below) is still used in the United States. Oceanographers usually measure underwater pressure in decibars (dbar) because an increase in pressure of 1 dbar is approximately equal to an increase in depth of 1 meter. Scuba divers often use a manometric rule of thumb: the pressure exerted by ten metres depth of water is approximately equal to one atmosphere. Because pressure is commonly measured by its ability to displace a column of liquid in a manometer, pressures are often expressed as a depth of a particular fluid (e.g., inches of water). The most common choices are mercury (Hg) and water; water is nontoxic and readily available, while mercury's high density allows for a shorter column (and so a smaller manometer) to measure a given pressure. The pressure exerted by a column of liquid of height h and density ρ is given by the hydrostatic pressure equation p = ρgh. Fluid density and local gravity can vary from one reading to another depending on local factors, so the height of a fluid column does not define pressure precisely. When millimeters of mercury or inches of mercury are quoted today, these units are not based on a physical column of mercury; rather, they have been given precise definitions that can be expressed in terms of SI units. The water-based units still depend on the density of water, a measured, rather than defined, quantity. These manometric units are still encountered in many fields. Blood pressure is measured in millimeters of mercury in most of the world, and lung pressures in centimeters of water are still common. As an example of varying pressures, a finger can be pressed against a wall without making any lasting impression; however, the same finger pushing a thumbtack can easily damage the wall. Although the force applied to the surface is the same, the thumbtack applies more pressure because the point concentrates that force into a smaller area. Pressure is transmitted to solid boundaries or across arbitrary sections of fluid normal to these boundaries or sections at every point. Unlike stress, pressure is defined as a scalar quantity. The gradient of pressure is called the force density. For gases, pressure is sometimes measured not as an absolute pressure, but relative to atmospheric pressure; such measurements are called gauge pressure (also sometimes spelled gage pressure).[1] An example of this is the air pressure in an automobile tire, which might be said to be "220�kPa", but is actually 220�kPa above atmospheric pressure. Since atmospheric pressure at sea level is about 100�kPa, the absolute pressure in the tire is therefore about 320�kPa. In technical work, this is written "a gauge pressure of 220�kPa". Where space is limited, such as on pressure gauges, name plates, graph labels, and table headings, the use of a modifier in parentheses, such as "kPa (gauge)" or "kPa (absolute)", is permitted. In non-SI technical work, a gauge pressure is sometimes written as "32�psig", though the other methods explained above that avoid attaching characters to the unit of pressure are preferred.[2] In a static gas, the gas as a whole does not appear to move. The individual molecules of the gas, however, are in constant random motion. Because we are dealing with an extremely large number of molecules and because the motion of the individual molecules is random in every direction, we do not detect any motion. If we enclose the gas within a container, we detect a pressure in the gas from the molecules colliding with the walls of our container. We can put the walls of our container anywhere inside the gas, and the force per unit area (the pressure) is the same. We can shrink the size of our "container" down to an infinitely small point, and the pressure has a single value at that point. Therefore, pressure is a scalar quantity, not a vector quantity. It has a magnitude but no direction associated with it. Pressure acts in all directions at a point inside a gas. At the surface of a gas, the pressure force acts perpendicular to the surface. This tensor may be divided up into a scalar part (pressure) and a traceless tensor part shear. The shear tensor gives the force in directions parallel to the surface, usually due to viscous or frictional forces. The stress tensor is sometimes called the pressure tensor, but in the following, the term "pressure" will refer only to the scalar pressure. Stagnation pressure is the pressure a fluid exerts when it is forced to stop moving. Consequently, although a fluid moving at higher speed will have a lower static pressure, it may have a higher stagnation pressure when forced to a standstill. Static pressure and stagnation pressure are related by the Mach number of the fluid. In addition, there can be differences in pressure due to differences in the elevation (height) of the fluid. See Bernoulli's equation (note: Bernoulli's equation only applies for incompressible flow). The pressure of a moving fluid can be measured using a Pitot tube, or one of its variations such as a Kiel probe or Cobra probe, connected to a manometer. Depending on where the inlet holes are located on the probe, it can measure static pressure or stagnation pressure.
Blood is a specialized bodily fluid (technically a tissue) that is composed of a liquid called blood plasma and blood cells suspended within the plasma. The blood cells present in blood are red blood cells (also called RBCs or erythrocytes), white blood cells (including both leukocytes and lymphocytes) and platelets (also called thrombocytes). Plasma is predominantly water containing dissolved proteins, salts and many other substances; and makes up about 55% of blood by volume. Mammals have red blood, which is bright red when oxygenated, due to hemoglobin. Some animals, such as the horseshoe crab use hemocyanin to carry oxygen, instead of hemoglobin. The most abundant cells in blood are red blood cells. These contain hemoglobin, an iron-containing protein, which facilitates transportation of oxygen by reversibly binding to this respiratory gas and greatly increasing its solubility in blood. In contrast, carbon dioxide is almost entirely transported extracellularly dissolved in plasma as bicarbonate ion. White blood cells help to resist infections and parasites, and platelets are important in the clotting of blood. Blood is circulated around the body through blood vessels by the pumping action of the heart. Arterial blood carries oxygen from inhaled air to the tissues of the body, and venous blood carries carbon dioxide, a waste product of metabolism produced by cells, from the tissues to the lungs to be exhaled. Blood accounts for 7% of the human body weight,[1] with an average density of approximately 1060 kg/m³, very close to pure water's density of 1000�kg/m3.[2] The average adult has a blood volume of roughly 5 litres, composed of plasma and several kinds of cells (occasionally called corpuscles); these formed elements of the blood are erythrocytes (red blood cells), leukocytes (white blood cells) and thrombocytes (platelets). By volume the red blood cells constitute about 45% of whole blood, the plasma constitutes about 55%, and white cells constitute a minute volume. Whole blood (plasma and cells) exhibits non-Newtonian fluid dynamics; its flow properties are adapted to flow effectively through tiny capillary blood vessels with less resistance than plasma by itself. In addition, if all human hemoglobin was free in the plasma rather than being contained in RBCs, the circulatory fluid would be too viscous for the cardiovascular system to function effectvely. About 55% of whole blood is blood plasma, a fluid that is the blood's liquid medium, which by itself is straw-yellow in color. The blood plasma volume totals of 2.7-3.0 litres in an average human. It is essentially an aqueous solution containing 92% water, 8% blood plasma proteins, and trace amounts of other materials. Plasma circulates dissolved nutrients, such as, glucose, amino acids and fatty acids (dissolved in the blood or bound to plasma proteins), and removes waste products, such as, carbon dioxide, urea and lactic acid. Blood is circulated around the body through blood vessels by the pumping action of the heart. Blood is pumped from the strong left ventricle of the heart through arteries to peripheral tissues and returns to the right atrium of the heart through veins. It then enters the right ventricle and is pumped through the pulmonary artery to the lungs and returns to the left atrium through the pulmonary veins. Blood then enters the left ventricle to be circulated again. Arterial blood carries oxygen from inhaled air to all of the cells of the body, and venous blood carries carbon dioxide, a waste product of metabolism by cells, to the lungs to be exhaled. However, one exception includes pulmonary arteries which contains the most deoxygenated blood in the body, while the pulmonary veins contain oxygenated blood. The various cells of blood are made in the bone marrow in a process called haematopoiesis, which includes erythropoiesis, the production of red blood cells; and myelopoiesis, the production of white blood cells and platelets. During childhood, almost every human bone produces red blood cells; as adults, red blood cell production is limited to the larger bones: the bodies of the vertebrae, the breastbone (sternum), the ribcage, the pelvic bones, and the bones of the upper arms and legs. In addition, during childhood, the thymus gland, found in the mediastinum, is an important source of lymphocytes.[7] Healthy erythrocytes have a plasma life of about 120 days before they are degraded by the spleen, and the Kupffer cells in the liver. The liver also clears some proteins, lipids and amino acids. The kidney actively secretes waste products into the urine. With the exception of pulmonary and umbilical arteries and their corresponding veins, arteries carry oxygenated blood away from the heart and deliver it to the body via arterioles and capillaries, where the oxygen is consumed; afterwards, venules and veins carry deoxygenated blood back to the heart. A fetus, receiving oxygen via the placenta, is exposed to much lower oxygen pressures (about 21% of the level found in an adult's lungs) and so fetuses produce another form of hemoglobin with a much higher affinity for oxygen (hemoglobin F) in order to function under these conditions.[12] When blood flows through capillaries, carbon dioxide diffuses from the tissues into the blood. Some carbon dioxide is dissolved in the blood. Some carbon dioxide reacts with hemoglobin and other proteins to form carbamino compounds. The remaining carbon dioxide is converted to bicarbonate and hydrogen ions through the action of RBC carbonic anhydrase. Most carbon dioxide is transported through the blood in the form of bicarbonate ions. In mammals, blood is in equilibrium with lymph, which is continuously formed in tissues from blood by capillary ultrafiltration. Lymph is collected by a system of small lymphatic vessels and directed to the thoracic duct, which drains into the left subclavian vein where lymph rejoins the systemic blood circulation. Blood circulation transports heat through the body, and adjustments to this flow are an important part of thermoregulation. Increasing blood flow to the surface (e.g. during warm weather or strenuous exercise) causes warmer skin, resulting in faster heat loss, while decreasing surface blood flow conserves heat. In insects, the blood (more properly called hemolymph) is not involved in the transport of oxygen. (Openings called tracheae allow oxygen from the air to diffuse directly to the tissues). Insect blood moves nutrients to the tissues and removes waste products in an open system. Other invertebrates use respiratory proteins to increase the oxygen carrying capacity. Hemoglobin is the most common respiratory protein found in nature. Hemocyanin (blue) contains copper and is found in crustaceans and mollusks. It is thought that tunicates (sea squirts) might use vanabins (proteins containing vanadium) for respiratory pigment (bright green, blue, or orange). In many invertebrates, these oxygen-carrying proteins are freely soluble in the blood; in vertebrates they are contained in specialized red blood cells, allowing for a higher concentration of respiratory pigments without increasing viscosity or damaging blood filtering organs like the kidneys. Hemoglobin is the principal determinant of the color of blood in vertebrates. Each molecule has four heme groups, and their interaction with various molecules alters the exact color. In vertebrates and other hemoglobin-using creatures, arterial blood and capillary blood are bright red as oxygen impacts a strong red color to the heme group. Deoxygenated blood is a darker shade of red; this is present in veins, and can be seen during blood donation and when venous blood samples are taken. Blood in carbon monoxide poisoning is bright red, because carbon monoxide causes the formation of carboxyhemoglobin. In cyanide poisoning, the body cannot utilize oxygen, so the venous blood remains oxygenated, increasing the redness. While hemoglobin containing blood is never blue, there are several conditions and diseases where the color of the heme groups make the skin appear blue. If the heme is oxidized, methemoglobin, which is more brownish and cannot transport oxygen, is formed. In the rare condition sulfhemoglobinemia, arterial hemoglobin is partially oxygenated, and appears dark-red with a bluish hue (cyanosis), but not quite as blueish as venous blood. Atherosclerosis reduces the flow of blood through arteries, because atheroma lines arteries and narrows them. Atheroma tends to increase with age, and its progression can be compounded by many causes including smoking, high blood pressure, excess circulating lipids (hyperlipidemia), and diabetes mellitus. Problems with blood composition, the pumping action of the heart, or narrowing of blood vessels can have many consequences including hypoxia (lack of oxygen) of the tissues supplied. The term ischaemia refers to tissue which is inadequately perfused with blood, and infarction refers to tissue death (necrosis) which can occur when the blood supply has been blocked (or is very inadequate). Problems with blood composition, the pumping action of the heart, or narrowing of blood vessels can have many consequences including hypoxia (lack of oxygen) of the tissues supplied. The term ischaemia refers to tissue which is inadequately perfused with blood, and infarction refers to tissue death (necrosis) which can occur when the blood supply has been blocked (or is very inadequate). Insufficient red cell mass (anemia) can be the result of bleeding, blood diseases like thalassemia, or nutritional deficiencies; and may require blood transfusion. Several countries have blood banks to fill the demand for transfusable blood. A person receiving a blood transfusion must have a blood type compatible with that of the donor. Insufficient red cell mass (anemia) can be the result of bleeding, blood diseases like thalassemia, or nutritional deficiencies; and may require blood transfusion. Several countries have blood banks to fill the demand for transfusable blood. A person receiving a blood transfusion must have a blood type compatible with that of the donor. Hemophilia is a genetic illness that causes dysfunction in one of the blood's clotting mechanisms. This can allow otherwise inconsequential wounds to be life-threatening, but more commonly results in hemarthrosis, or bleeding into joint spaces, which can be crippling. Substances other than oxygen can bind to hemoglobin; in some cases this can cause irreversible damage to the body. Carbon monoxide, for example, is extremely dangerous when carried to the blood via the lungs by inhalation, because carbon monoxide irreversibly binds to hemoblobin to form carboxyhemoglobin, so that less hemoglobin is free to bind oxygen, and less oxygen can be transported in the blood. This can cause suffocation insidiously. A fire burning in an enclosed room with poor ventilation presents a very dangerous hazard since it can create a build-up of carbon monoxide in the air. Some carbon monoxide binds to hemoglobin when smoking tobacco. Blood for transfusion is obtained from human donors by blood donation and stored in a blood bank. There are many different blood types in humans, the ABO blood group system, and the Rhesus blood group system being the most important. Transfusion of blood of an incompatible blood group may cause severe, often fatal, complications, so crossmatching is done to ensure that a compatible blood product is transfused. After severe acute blood loss, liquid preparations, generically known as plasma expanders, can be given intravenously, either solutions of salts (NaCl, KCl, CaCl2 etc...) at physiological concentrations, or colloidal solutions, such as dextrans, human serum albumin, or fresh frozen plasma. In these emergency situations, a plasma expander is a more effective life saving procedure than a blood transfusion, because the metabolism of transfused red blood cells does not restart immediately after a transfusion. In modern evidence-based medicine bloodletting is used in management of a few rare diseases, including haemochromatosis and polycythemia. However, bloodletting and leeching were common unvalidated interventions used until the 19th century, as many diseases were incorrectly thought to be due to an excess of blood, according to Hippocratic medicine. Due to its importance to life, blood is associated with a large number of beliefs. One of the most basic is the use of blood as a symbol for family relationships; to be "related by blood" is to be related by ancestry or descendance, rather than marriage. This bears closely to bloodlines, and sayings such as "blood is thicker than water" and "bad blood", as well as "Blood brother". Blood is given particular emphasis in the Jewish and Christian religions because Leviticus 17:11 says "the life of a creature is in the blood." This phrase is part of the Levitical law forbidding the drinking of blood, due to its practice in idol worship by surrounding societies. Among the Germanic tribes (such as the Anglo-Saxons and the Norsemen), blood was used during their sacrifices; the Blóts. The blood was considered to have the power of its originator and after the butchering the blood was sprinkled on the walls, on the statues of the gods and on the participants themselves. This act of sprinkling blood was called bleodsian in Old English and the terminology was borrowed by the Roman Catholic Church becoming to bless and blessing. The Hittite word for blood, ishar was a cognate to words for "oath" and "bond", see Ishara. The Ancient Greeks believed that the blood of the Gods, ichor, was a mineral that was poisonous to mortals. Some Christian churches, including Roman Catholicism, Eastern Orthodoxy, and branches of Anglicanism teach that, when consecrated, the Eucharistic wine actually becomes the material blood of Jesus. Thus in the consecrated wine, Jesus becomes spiritually and physically present. This teaching is rooted in the Last Supper as written in the four gospels of the Bible, in which Jesus stated to his disciples that the bread which they ate was his body, and the wine was his blood. "This cup is the new testament in my blood, which is shed for you." (Luke 22:20). Various forms of Protestantism, especially those of a Wesleyan or Presbyterian lineage, teach that the wine is no more than a symbol of the blood of Christ, who is spiritually but not physically present. Lutheran theology teaches that the body and blood is present together "in, with, and under" the bread and wine of the Eucharistic feast. Due to Bible-based beliefs, Jehovah's Witnesses do not eat blood or accept tranfusions of whole blood or its four major components namely, red blood cells, white blood cells, platelets (thrombocytes), and whole plasma. Members are instructed to personally decide whether or not to accept fractions, and medical procedures that involve their own blood. In Chinese culture, it is often said that if a man's nose produces a small flow of blood, this signifies that he is experiencing sexual desire. This often appears in Chinese-language and Hong Kong films as well as in Japanese culture parodied in anime and manga. Characters, mostly males, will often be shown with a nosebleed if they have just seen someone nude or in little clothing, or if they have had an erotic thought or fantasy.[21] Various religious and other groups have been falsely accused of using human blood in rituals; such accusations are known as blood libel. The most common form of this is blood libel against Jews. Although there is no ritual involving human blood in Jewish law or custom, fabrications of this nature (often involving the murder of children) were widely used during the Middle Ages to justify Antisemitic persecution and some have persisted into the 21st century. Blood is one of the body fluids that has been used in art.[22] In particular, the performances of Viennese Actionist Hermann Nitsch, Franko B, Lennie Lee, Ron Athey, Yang Zhichao and Kira O' Reilly along with the photography of Andres Serrano, have incorporated blood as a prominent visual element. Marc Quinn has made sculptures using frozen blood, including a cast of his own head made using his own blood. Blood is also the main leitmotiv in Maligno Art.
Some meteorologists prefer the hectopascal (hPa) for atmospheric air pressure, which is equivalent to the older unit millibar (mbar). Similar pressures are given in kilopascals (kPa) in most other fields, where the hecto prefix is rarely used. The unit inch of mercury (inHg, see below) is still used in the United States. Oceanographers usually measure underwater pressure in decibars (dbar) because an increase in pressure of 1 dbar is approximately equal to an increase in depth of 1 meter. Scuba divers often use a manometric rule of thumb: the pressure exerted by ten metres depth of water is approximately equal to one atmosphere. Because pressure is commonly measured by its ability to displace a column of liquid in a manometer, pressures are often expressed as a depth of a particular fluid (e.g., inches of water). The most common choices are mercury (Hg) and water; water is nontoxic and readily available, while mercury's high density allows for a shorter column (and so a smaller manometer) to measure a given pressure. The pressure exerted by a column of liquid of height h and density ρ is given by the hydrostatic pressure equation p = ρgh. Fluid density and local gravity can vary from one reading to another depending on local factors, so the height of a fluid column does not define pressure precisely. When millimeters of mercury or inches of mercury are quoted today, these units are not based on a physical column of mercury; rather, they have been given precise definitions that can be expressed in terms of SI units. The water-based units still depend on the density of water, a measured, rather than defined, quantity. These manometric units are still encountered in many fields. Blood pressure is measured in millimeters of mercury in most of the world, and lung pressures in centimeters of water are still common. As an example of varying pressures, a finger can be pressed against a wall without making any lasting impression; however, the same finger pushing a thumbtack can easily damage the wall. Although the force applied to the surface is the same, the thumbtack applies more pressure because the point concentrates that force into a smaller area. Pressure is transmitted to solid boundaries or across arbitrary sections of fluid normal to these boundaries or sections at every point. Unlike stress, pressure is defined as a scalar quantity. The gradient of pressure is called the force density. For gases, pressure is sometimes measured not as an absolute pressure, but relative to atmospheric pressure; such measurements are called gauge pressure (also sometimes spelled gage pressure).[1] An example of this is the air pressure in an automobile tire, which might be said to be "220�kPa", but is actually 220�kPa above atmospheric pressure. Since atmospheric pressure at sea level is about 100�kPa, the absolute pressure in the tire is therefore about 320�kPa. In technical work, this is written "a gauge pressure of 220�kPa". Where space is limited, such as on pressure gauges, name plates, graph labels, and table headings, the use of a modifier in parentheses, such as "kPa (gauge)" or "kPa (absolute)", is permitted. In non-SI technical work, a gauge pressure is sometimes written as "32�psig", though the other methods explained above that avoid attaching characters to the unit of pressure are preferred.[2] In a static gas, the gas as a whole does not appear to move. The individual molecules of the gas, however, are in constant random motion. Because we are dealing with an extremely large number of molecules and because the motion of the individual molecules is random in every direction, we do not detect any motion. If we enclose the gas within a container, we detect a pressure in the gas from the molecules colliding with the walls of our container. We can put the walls of our container anywhere inside the gas, and the force per unit area (the pressure) is the same. We can shrink the size of our "container" down to an infinitely small point, and the pressure has a single value at that point. Therefore, pressure is a scalar quantity, not a vector quantity. It has a magnitude but no direction associated with it. Pressure acts in all directions at a point inside a gas. At the surface of a gas, the pressure force acts perpendicular to the surface. This tensor may be divided up into a scalar part (pressure) and a traceless tensor part shear. The shear tensor gives the force in directions parallel to the surface, usually due to viscous or frictional forces. The stress tensor is sometimes called the pressure tensor, but in the following, the term "pressure" will refer only to the scalar pressure. Stagnation pressure is the pressure a fluid exerts when it is forced to stop moving. Consequently, although a fluid moving at higher speed will have a lower static pressure, it may have a higher stagnation pressure when forced to a standstill. Static pressure and stagnation pressure are related by the Mach number of the fluid. In addition, there can be differences in pressure due to differences in the elevation (height) of the fluid. See Bernoulli's equation (note: Bernoulli's equation only applies for incompressible flow). The pressure of a moving fluid can be measured using a Pitot tube, or one of its variations such as a Kiel probe or Cobra probe, connected to a manometer. Depending on where the inlet holes are located on the probe, it can measure static pressure or stagnation pressure.
Blood is a specialized bodily fluid (technically a tissue) that is composed of a liquid called blood plasma and blood cells suspended within the plasma. The blood cells present in blood are red blood cells (also called RBCs or erythrocytes), white blood cells (including both leukocytes and lymphocytes) and platelets (also called thrombocytes). Plasma is predominantly water containing dissolved proteins, salts and many other substances; and makes up about 55% of blood by volume. Mammals have red blood, which is bright red when oxygenated, due to hemoglobin. Some animals, such as the horseshoe crab use hemocyanin to carry oxygen, instead of hemoglobin. By far the most abundant cells in blood are red blood cells. These contain hemoglobin, an iron-containing protein, which facilitates transportation of oxygen by reversibly binding to this respiratory gas and greatly increasing its solubility in blood. In contrast, carbon dioxide is almost entirely transported extracellularly dissolved in plasma as bicarbonate ion. White blood cells help to resist infections and parasites, and platelets are important in the clotting of blood. Blood is circulated around the body through blood vessels by the pumping action of the heart. Arterial blood carries oxygen from inhaled air to the tissues of the body, and venous blood carries carbon dioxide, a waste product of metabolism produced by cells, from the tissues to the lungs to be exhaled. Blood accounts for 7% of the human body weight,[1] with an average density of approximately 1060 kg/m³, very close to pure water's density of 1000�kg/m3.[2] The average adult has a blood volume of roughly 5 litres, composed of plasma and several kinds of cells (occasionally called corpuscles); these formed elements of the blood are erythrocytes (red blood cells), leukocytes (white blood cells) and thrombocytes (platelets). By volume the red blood cells constitute about 45% of whole blood, the plasma constitutes about 55%, and white cells constitute a minute volume. Whole blood (plasma and cells) exhibits non-Newtonian fluid dynamics; its flow properties are adapted to flow effectively through tiny capillary blood vessels with less resistance than plasma by itself. In addition, if all human haemoglobin was free in the plasma rather than being contained in RBCs, the circulatory fluid would be too viscous for the cardiovascular system to function effectvely. About 55% of whole blood is blood plasma, a fluid that is the blood's liquid medium, which by itself is straw-yellow in color. The blood plasma volume totals of 2.7-3.0 litres in an average human. It is essentially an aqueous solution containing 92% water, 8% blood plasma proteins, and trace amounts of other materials. Plasma circulates dissolved nutrients, such as, glucose, amino acids and fatty acids (dissolved in the blood or bound to plasma proteins), and removes waste products, such as, carbon dioxide, urea and lactic acid. Blood is circulated around the body through blood vessels by the pumping action of the heart. Blood is pumped from the strong left ventricle of the heart through arteries to peripheral tissues and returns to the right atrium of the heart through veins. It then enters the right ventricle and is pumped through the pulmonary artery to the lungs and returns to the left atrium through the pulmonary veins. Blood then enters the left ventricle to be circulated again. Arterial blood carries oxygen from inhaled air to all of the cells of the body, and venous blood carries carbon dioxide, a waste product of metabolism by cells, to the lungs to be exhaled. However, one exception includes pulmonary arteries which contains the most deoxygenated blood in the body, while the pulmonary veins contain oxygenated blood. The various cells of blood are made in the bone marrow in a process called haematopoiesis, which includes erythropoiesis, the production of red blood cells; and myelopoiesis, the production of white blood cells and platelets. During childhood, almost every human bone produces red blood cells; as adults, red blood cell production is limited to the larger bones: the bodies of the vertebrae, the breastbone (sternum), the ribcage, the pelvic bones, and the bones of the upper arms and legs. In addition, during childhood, the thymus gland, found in the mediastinum, is an important source of lymphocytes.[7] Healthy erythrocytes have a plasma life of about 120 days before they are degraded by the spleen, and the Kupffer cells in the liver. The liver also clears some proteins, lipids and amino acids. The kidney actively secretes waste products into the urine. With the exception of pulmonary and umbilical arteries and their corresponding veins, arteries carry oxygenated blood away from the heart and deliver it to the body via arterioles and capillaries, where the oxygen is consumed; afterwards, venules and veins carry deoxygenated blood back to the heart. A fetus, receiving oxygen via the placenta, is exposed to much lower oxygen pressures (about 21% of the level found in an adult's lungs) and so fetuses produce another form of hemoglobin with a much higher affinity for oxygen (hemoglobin F) in order to function under these conditions.[12] When blood flows through capillaries, carbon dioxide diffuses from the tissues into the blood. Some carbon dioxide is dissolved in the blood. Some carbon dioxide reacts with hemoglobin and other proteins to form carbamino compounds. The remaining carbon dioxide is converted to bicarbonate and hydrogen ions through the action of RBC carbonic anhydrase. Most carbon dioxide is transported through the blood in the form of bicarbonate ions. In mammals, blood is in equilibrium with lymph, which is continuously formed in tissues from blood by capillary ultrafiltration. Lymph is collected by a system of small lymphatic vessels and directed to the thoracic duct, which drains into the left subclavian vein where lymph rejoins the systemic blood circulation. Blood circulation transports heat through the body, and adjustments to this flow are an important part of thermoregulation. Increasing blood flow to the surface (e.g. during warm weather or strenuous exercise) causes warmer skin, resulting in faster heat loss, while decreasing surface blood flow conserves heat. In insects, the blood (more properly called hemolymph) is not involved in the transport of oxygen. (Openings called tracheae allow oxygen from the air to diffuse directly to the tissues). Insect blood moves nutrients to the tissues and removes waste products in an open system. Other invertebrates use respiratory proteins to increase the oxygen carrying capacity. Hemoglobin is the most common respiratory protein found in nature. Hemocyanin (blue) contains copper and is found in crustaceans and mollusks. It is thought that tunicates (sea squirts) might use vanabins (proteins containing vanadium) for respiratory pigment (bright green, blue, or orange). In many invertebrates, these oxygen-carrying proteins are freely soluble in the blood; in vertebrates they are contained in specialized red blood cells, allowing for a higher concentration of respiratory pigments without increasing viscosity or damaging blood filtering organs like the kidneys. Hemoglobin is the principal determinant of the color of blood in vertebrates. Each molecule has four heme groups, and their interaction with various molecules alters the exact color. In vertebrates and other hemoglobin-using creatures, arterial blood and capillary blood are bright red as oxygen impacts a strong red color to the heme group. Deoxygenated blood is a darker shade of red with a bluish hue; this is present in veins, and can be seen during blood donation and when venous blood samples are taken. Blood in carbon monoxide poisoning is bright red, because carbon monoxide causes the formation of carboxyhemoglobin. In cyanide poisoning, the body cannot utilize oxygen, so the venous blood remains oxygenated, increasing the redness. While hemoglobin containing blood is never blue, there are several conditions and diseases where the color of the heme groups make the skin appear blue. If the heme is oxidized, methemoglobin, which is more brownish and cannot transport oxygen, is formed. In the rare condition sulfhemoglobinemia, arterial hemoglobin is partially oxygenated, and appears dark-red with a bluish hue (cyanosis), but not quite as blueish as venous blood. Atherosclerosis reduces the flow of blood through arteries, because atheroma lines arteries and narrows them. Atheroma tends to increase with age, and its progression can be compounded by many causes including smoking, high blood pressure, excess circulating lipids (hyperlipidemia), and diabetes mellitus. Problems with blood composition, the pumping action of the heart, or narrowing of blood vessels can have many consequences including hypoxia (lack of oxygen) of the tissues supplied. The term ischaemia refers to tissue which is inadequately perfused with blood, and infarction refers to tissue death (necrosis) which can occur when the blood supply has been blocked (or is very inadequate). Problems with blood composition, the pumping action of the heart, or narrowing of blood vessels can have many consequences including hypoxia (lack of oxygen) of the tissues supplied. The term ischaemia refers to tissue which is inadequately perfused with blood, and infarction refers to tissue death (necrosis) which can occur when the blood supply has been blocked (or is very inadequate). Insufficient red cell mass (anemia) can be the result of bleeding, blood diseases like thalassemia, or nutritional deficiencies; and may require blood transfusion. Several countries have blood banks to fill the demand for transfusable blood. A person receiving a blood transfusion must have a blood type compatible with that of the donor. Insufficient red cell mass (anemia) can be the result of bleeding, blood diseases like thalassemia, or nutritional deficiencies; and may require blood transfusion. Several countries have blood banks to fill the demand for transfusable blood. A person receiving a blood transfusion must have a blood type compatible with that of the donor. Hemophilia is a genetic illness that causes dysfunction in one of the blood's clotting mechanisms. This can allow otherwise inconsequential wounds to be life-threatening, but more commonly results in hemarthrosis, or bleeding into joint spaces, which can be crippling. Substances other than oxygen can bind to hemoglobin; in some cases this can cause irreversible damage to the body. Carbon monoxide, for example, is extremely dangerous when carried to the blood via the lungs by inhalation, because carbon monoxide irreversibly binds to hemoblobin to form carboxyhemoglobin, so that less hemoglobin is free to bind oxygen, and less oxygen can be transported in the blood. This can cause suffocation insidiously. A fire burning in an enclosed room with poor ventilation presents a very dangerous hazard since it can create a build-up of carbon monoxide in the air. Some carbon monoxide binds to hemoglobin when smoking tobacco. Blood for transfusion is obtained from human donors by blood donation and stored in a blood bank. There are many different blood types in humans, the ABO blood group system, and the Rhesus blood group system being the most important. Transfusion of blood of an incompatible blood group may cause severe, often fatal, complications, so crossmatching is done to ensure that a compatible blood product is transfused. After severe acute blood loss, liquid preparations, generically known as plasma expanders, can be given intravenously, either solutions of salts (NaCl, KCl, CaCl2 etc...) at physiological concentrations, or colloidal solutions, such as dextrans, human serum albumin, or fresh frozen plasma. In these emergency situations, a plasma expander is a more effective life saving procedure than a blood transfusion, because the metabolism of transfused red blood cells does not restart immediately after a transfusion. In modern evidence-based medicine bloodletting is used in management of a few rare diseases, including haemochromatosis and polycythemia. However, bloodletting and leeching were common unvalidated interventions used until the 19th century, as many diseases were incorrectly thought to be due to an excess of blood, according to Hippocratic medicine. Due to its importance to life, blood is associated with a large number of beliefs. One of the most basic is the use of blood as a symbol for family relationships; to be "related by blood" is to be related by ancestry or descendance, rather than marriage. This bears closely to bloodlines, and sayings such as "blood is thicker than water" and "bad blood", as well as "Blood brother". Blood is given particular emphasis in the Jewish and Christian religions because Leviticus 17:11 says "the life of a creature is in the blood." This phrase is part of the Levitical law forbidding the drinking of blood, due to its practice in idol worship by surrounding societies. Among the Germanic tribes (such as the Anglo-Saxons and the Norsemen), blood was used during their sacrifices; the Blóts. The blood was considered to have the power of its originator and after the butchering the blood was sprinkled on the walls, on the statues of the gods and on the participants themselves. This act of sprinkling blood was called bleodsian in Old English and the terminology was borrowed by the Roman Catholic Church becoming to bless and blessing. The Hittite word for blood, ishar was a cognate to words for "oath" and "bond", see Ishara. The Ancient Greeks believed that the blood of the Gods, ichor, was a mineral that was poisonous to mortals. Some Christian churches, including Roman Catholicism, Eastern Orthodoxy, and branches of Anglicanism teach that, when consecrated, the Eucharistic wine actually becomes the material blood of Jesus. Thus in the consecrated wine, Jesus becomes spiritually and physically present. This teaching is rooted in the Last Supper as written in the four gospels of the Bible, in which Jesus stated to his disciples that the bread which they ate was his body, and the wine was his blood. "This cup is the new testament in my blood, which is shed for you." (Luke 22:20). Various forms of Protestantism, especially those of a Wesleyan or Presbyterian lineage, teach that the wine is no more than a symbol of the blood of Christ, who is spiritually but not physically present. Lutheran theology teaches that the body and blood is present together "in, with, and under" the bread and wine of the Eucharistic feast. Due to Bible-based beliefs, Jehovah's Witnesses do not eat blood or accept tranfusions of whole blood or its four major components namely, red blood cells, white blood cells, platelets (thrombocytes), and whole plasma. Members are instructed to personally decide whether or not to accept fractions, and medical procedures that involve their own blood. In Chinese culture, it is often said that if a man's nose produces a small flow of blood, this signifies that he is experiencing sexual desire. This often appears in Chinese-language and Hong Kong films as well as in Japanese culture parodied in anime and manga. Characters, mostly males, will often be shown with a nosebleed if they have just seen someone nude or in little clothing, or if they have had an erotic thought or fantasy.[20] Various religious and other groups have been falsely accused of using human blood in rituals; such accusations are known as blood libel. The most common form of this is blood libel against Jews. Although there is no ritual involving human blood in Jewish law or custom, fabrications of this nature (often involving the murder of children) were widely used during the Middle Ages to justify anti-Semitic persecution and some have persisted into the 21st century. Blood is one of the body fluids that has been used in art.[21] In particular, the performances of Viennese Actionist Hermann Nitsch, Franko B, Lennie Lee, Ron Athey, Yang Zhichao and Kira O' Reilly along with the photography of Andres Serrano, have incorporated blood as a prominent visual element. Marc Quinn has made sculptures using frozen blood, including a cast of his own head made using his own blood.
Some meteorology it sleeps (mbar) long the unit wheat which becomes li hazard hectopascal (hPa) it likes the waiting atmospheric pressure which is equal with. The pressure which is similar the hecto prefix is rare in the place and it does not use, kilopascals (kPa) it gives an inside inside most big different field. The unit inch of the mercury (inHg, it sees on lower part) uses yet from the United States. Inside pressure of the dbar1 the increase approximately enough in increase of 1 meter, because is equal the oceanic scholar hun to do (dbar) measures an underwater pressure inside the decibars. su The Cuba die the manometer it uses a young count at any time when it earns money: By the depth 10 meter of the adjacent waters the pressure which is displayed approximately is equal in 1 atmosphere. The pressure is the liquid inside the manometer, by it ability which displaces in order to measure generally, pressure the liquid (when for example of adjacent waters, inch) which is special with depth it expresses at any time. The general selection with the mercury (hecto gram) is the adjacent waters,; Measuring the pressure which it gives the mercury high density is shorter and it is and (and to be like this a smaller manometer) considers but, the adjacent waters rain virulence and to be prepared, Iss it is effective. Altitude h and the dense moral liquid is by it is displayed pressure? By a liquid affection epidemiology pressure equation the p=? The gh. the liquidity density gives and the local gravity is leaning the local factor also it will can change from the fact that in different one thing it reads and all, it is like that and liquidity it is and and accurate altitude pressure it is and it does not define. When the millimeter of the mercury or inch of the mercury is referred today, this unit the flesh of the mercury is does not put a foundation,; It gave the justice which is accurate rather, them could express from point of SI unit. The water-based the unit measures and density of the adjacent waters, yet, it defines rather, both it depends. This manometer unit encounters the inside many field yet. The blood pressure inside the maximum quantity of the world measures inside millimeter of the mercury, phyey the pressure yet is joint ownership Ji inside the mote meter which the adjacent waters it counts. Changes a pressure in the example due to, the finger the what kind of is continued to increase period without the secluded village, there is a possibility of pressing; But, gap b tac the k the wheat the finger which is identical easily it will be able to damage the wall. If it is applied in the surface and the force is the identical water, gap b tac the k compared to inflicts a pressure in order to concentrate that force with the small area the point. The pressure in this guard in hard guard or in the liquidity normal optional profile or each point is delivered in that piece of the profile. With tension it is different, the pressure is defined with the pretense where there is a phase. The gradient of pressure calls force density. Hazard the gas, the pressure is not and at absolute pressure, regarding an atmospheric pressure but from time to time it measures; It talked like that measurement calls and opportunity pressure (also opportunity pressure which spelling it does from time to time). [ 1 ] this it sees "220.kPa", and but actual up of atmospheric pressure 220.kPa inside the car tire atmospheric pressure. If cough atmospheric pressure 100.kPa regarding because of convenience, inside the tire absolute pressure 320.kPa regarding is like that reason. Inside technical one, this "220.kPa writes an opportunity pressure". The space attaching and talking and being same being limited in pressure opportunity and and, the plate which is famous, the chart trademark and the table, "kPa (opportunity)" or "(absoluteness) in kPa" modifier old friendship use and the title place, it is permitted. Inside nothing Si technical one, above secret intention it is explained and if the different method to attach evades a quality in unit of pressure, it wins and but "32.psig", the preferred. [ 2 ] and the gas generalizes inside the gas which is stagnant moving and with the fact that the opportunity pressure writes together from time to time. The personal element of the gas, but, is to inside schedule grudge random motion. Because treats the large number we the element extremely, and because the motion of the personal element is random inside each direction, we do not detect a what kind of motion. When we the cone reel besiege the gas inside you, we from the element where our cone reel collides to your wall detect a pressure inside the gas. We on gas internal our cone reel your wall are two possibilities from which place, unit area (pressure) the sugar force is the identical water. We are infinite and our "cone reel your" size it will be able to shrink in lower part to small point, to pressure the value which is simple is from the point of view. Is not the vector ocean and in like that reason, the pressure is the pretense where there is a phase. To it the size which is assembled to it there is not a direction but. The pressure on gas internal in point acts inside all direction. In the surface of the gas, the pressure in the surface acts in hand weaving. This tensor comfort is divided does not know with the portion (pressure) which is phase and the traceless tensor attachment scissors. The scissors tensor does and viscosity in the surface where the expiration of time becomes in the rim force which it will write, hun a force inside the direction which is parallel it gives. The variation power tensor to call as the pressure tensor from time to time, inside the thing which is to come but after, the duration "pressure" is to only point at the pressure which will be phase. The stagnation pressure is forced movement the distant weight atlas when to be peeled and it is a pressure which the liquid displays. When forcing in standstill, than, to the liquid to move to the speed which is higher compared to low-end there will be a pressure which will be stagnant and an inevitably, to it higher stagnation pressure does not know is. The pressure which is stagnant and stagnation pressure relate by the Mach number of the liquid. It will be more, from that place elevation (altitude) of the liquid inside it is different it will be different inside the pressure where is expiration of time there is a possibility which it will be. The Bernoulli's equation (see the week: The Bernoulli's the equation applies incompressible flow only). The pressure of the liquid which moves the Kiel investigation nose pu investigation will use Pitot tube or a grudge of same it mutation, it will connect it will can measure with the manometer and. It is leaning in the place where the inlet hole is located in investigation, it it will be able to measure the pressure or stagnation pressure which is stagnant.
By the blood will be the specialized bodily liquid (technically cloth) comprised the liquid caused plasma of blood and cells of blood suspended inside plasma. By the cells of the blood prisytstvyyushchimi in the blood will be also the caused cells of the blood (RBChs or by erythrocytes), the white cells of the blood (including leukocytes and lymphocytes) and also caused platelets (thrombocytes). Plasma will be larger part by the water containing the dissolved proteins, salts are many other substances; and make upward about 55% of blood with volume. Mammals have by the red blood, which will be bright red color after it oxygenated, proper to hemoglobin. Some animals, such as horseshoe hemocyanin benefit of cancer in order to lay oxygen, instead of hemoglobin. By far the most abundant cells in the blood will be the cells of the blood. These hemoglobin, iron -.soderja contain the protein, which facilitates the transportation of oxygen of reverzibel'n to connect to this respiratory gas and is large to increase its solubility in the blood. In contrast, carbon dioxide is almost vs transportirovana extracellularly after it it is dissolved in the plasma as bicarbonate ion. The white cells of the blood help to resist infections and parasites, and platelets are important in to be rolled up the blood. The blood is provide ford circulation around the body through the blood vessels forcing with the action of heart. The arterial blood bears oxygen from inhaled air to the cloths of body, and the venous blood bears the dioxide of carbon, withdrawals of metabolism produced by cells, from the cloths to legkyam, it is which necessary to isolate. The blood consider for 7% of the weight of human body, [ 1 ] with an average density approximately of 1060 kg/mі, very close to water is pure density of y000..kg/me.[2 ] average, is which adult it has that of the blood roughly of 5 liters, composed of plasma and several is specific it is random the caused cells (by corpuscles); by these formed elements of the blood will be erythrocytes (cell of the blood), leukocytes (white cells of the blood) and thrombocytes (by platelets). by the volume of the cell of the blood form about 45% of the entire blood, plasma forms of about 55%, and white cells form the smallest volume. Entire blood (plasma and cells) exhibits non-.non-Neshtonian liquid dynamics; their properties of supply are fitted out in order to pass effectively through the tiny capillary blood vessels with less the resistance than plasma by themselves. In addition, if entire human hemoglobin was free in plasma rather than it were contained in RBCs, then circulatory liquid would be too vyazkostna for the cardiovascular system in order to act effectvely. About 55% of the entire blood will be the plasma of the blood, by liquid which will be the means of the blood liquid, which by itself straw -.jelto in the color. Sums of the volume of the plasma of the blood of 2.7-3.0 liters in the average person. It will be necessarily aqueous solution containing water 92%, proteins of the plasma of blood 8%, and sums of the laying out of other materials. Plasma ensures circulation the dissolved nutrients, such as, glucose, amino acid and welded acids (dissolved in the blood or the limit to the proteins of plasma), and extracts withdrawals, such as, carbon dioxide, urea and lactic acid. The blood is provide ford circulation around the body through the blood vessels forcing with the action of heart. The blood is forced from the strong left ventricle of the heart through the arteries to the outlying cloths and returns to the right atrium of the heart through the veins. It after this enters into right ventricle and is forced through the pulmonary artery to legkyam and returns to the left atrium through the pulmonary veins. The blood after this enters into left ventricle, it is which necessary to ensure circulation again. The arterial blood bears oxygen from inhaled air to the entire from the cells of body, and the venous blood bears the dioxide of carbon, withdrawals of metabolism by cells, to legkyam, it is which necessary to isolate. However, one exception vklyuayet pulmonary arteries which it contains the large part of deoxygenated the blood in the tele-, until pulmonary veins contain the oxygenated blood. Different cells of the blood are made in the core of bone in process that caused haematopoiesis, which vklyuayet erythropoiesis, the production of the cell of the blood; and myelopoiesis, the production of the white cells of the blood and platelet. During the childhood, almost each human bone performs the cells of the blood; as adult, the production of the cell of the blood is limited to the larger bones: the body of vertebrae, breastbone (sternum), ribcage, pelvic bones, and the bones of upper handles and feet In addition, during the childhood, iron of the thymus, found in mediastinum, will be the important source ] of healthy erythrocyte lymphocytes.[7 it has a life of plasma of approximately 120 days before they they are worsened by spleen, and cell Kupffer in the liver. Liver also frees some proteins, lipids and amino acids. Kidney actively makes with the secret of withdrawals into the urine. With exception of pulmonary and umbilical arteries and their corresponding veins, artery they bear the oxygenated blood away from the heart and are supplied it for the body through the arterioles and capillaries, where oxygen is destroyed; then, venules and veins bear deoxygenated blood back to heart. Fetus, obtaining oxygen through semyanoyets, undergoes action to much nizkeye to pressures of oxygen (of about 21% of the level of the obtained in legkyakh adult) and therefore fetuses is produced another form of hemoglobin much vysokeye with an affinity for oxygen (hemoglobin f) in order to act under these conditions.[12 ] when the blood passes through the capillaries, carbon dioxide they reflect from the cloths into the blood. Certain carbon dioxide is dissolved in the blood. Certain carbon dioxide reacts with hemoglobin and other proteins to mixtures carbamino of form. Remaining carbon dioxide is preobrazovana to the ions of bicarbonate and water-hearth through the action of anhydrase RBC of carbonic. Majorities carbon dioxide is transportirovana through blood in the form of bicarbonate ions. In mammals, the blood find in the equilibrium with the lymph, which is continuously formed in the cloths from blood capillary by ultrafiltration. Lymph is assembled by the system of small lymphatic vessels and is directed toward the thoracic conduit, which flows into the left subclavian vein where lymph rejoins systemic blood circulation. Blood circulation transports heat through the body, and adjustments to this supply they will be the important part thermoregulation. Increasing the supply to the blood to the surface (for example during the warm weather or strenuous training) it causes warmer skin, resulting in more rapid poteryaa of heat, until decreasing the surface supply to the blood preserves heat. In the insects, pravil'eye the caused blood (by hemolymph) is not included in the passage of oxygen (caused openings by tracheas they make it possible oxygen from air to reflect immediately to the cloths). The blood of insect moves nutrients to the cloths and it extracts withdrawals in the open system. Others invertebrates use respiratory proteins in order to increase the capacity of oxygen. Hemoglobin will be the most general respiratory protein found from the essence. Hemocyanin (blue) contains copper and it is found in crustaceans and mollusks. Thought that tunicates (sea squirts) we could use vanabins (proteins containing vanadium) for the respiratory pigment (bright green, blue, or orange). In much invertebrates, these proteins oxygen -.nos4 will be freely soluble in the blood; in vertebrates they are contained into the specialized cells of the blood, pozvolyayushch for the higher concentration of respiratory pigments without the organs increasing viscosity or damaging the blood filtering as kidneys. Hemoglobin will be mainly the determinant of the color of the blood in vertebrates. Each molecule has 4 groups heme, and their interaction with different molecules changes accurately color. In vertebrates and others hemoglobin -.ispol6zu4 creatures, with the arterial blood and the blood of capillary they will be bright red color in proportion to oxygen it tightly compresses strong red color to group heme. Blood Deoxygenated will be the darker shadow of red color with the the bluish hue; this is present in the veins, and it can be seen during the donation of the blood and when the models of the venous blood are accepted. Bright red color will be the blood in poisoning of carbon monoxide, because carbon monoxide causes formation carboxyhemoglobin. In poisoning of cyanide, the body cannot use oxygen; therefore the oxygenated remainder of the venous blood, uvelichivayushch redness. Thus far hemoglobin containing the blood is ever blue, will several condition and diseases where the color of groups heme makes the skin seem by blue. If heme is oxidized, then methemoglobin, which more brownish and cannot transport oxygen, it is formed. Sulfhemoglobinemia Condition, arterial hemoglobin is partially oxygenated in the the rare, and seems dark- red with the the bluish hue (by cyanosis), but is sufficient as blueish as the venous blood. Atherosclerosis decreases the supply to the blood through the arteries, because atheroma are equalized arteries and reduces them Atheroma it tends to increase in the course of time, and its progression can be mixed many reasons including to smoke, high pressure, the lipids of surplus ensuring circulation (hyperlipidemia), and mellitus diabetes. Problems with the composition of the blood, forcing by the action of heart, or to reduce blood vessels can have many consequences including hypoxia (otsutsviye of oxygen) of the set cloths. Ischemia term refers to the cloth insufficiently it is perfused with the blood, and infarction refers to death of cloth (necrosis) which can occur when delivery to the blood was barred (or it will be very nedostatochn). Problems with the composition of the blood, forcing by the action of heart, or to reduce blood vessels can have many consequences including hypoxia (otsutsviye of oxygen) of the set cloths. Ischemia term refers to the cloth insufficiently it is perfused with the blood, and infarction refers to death of cloth (necrosis) which can occur when delivery to the blood was barred (or it will be very nedostatochn). With the insufficient red mass of cell (anemia) can be the result of hemorrhage, the diseases of the blood as thalassemia, or by nourishing scarcities; and can require the blood transfusion. Several countries have banks of the blood in order to fill the requirement for transfusable of the blood. Persona obtaining the blood transfusions it must have a type of the blood compatible with the fact from the donor. With the insufficient red mass of cell (anemia) can be the result of hemorrhage, the diseases of the blood as thalassemia, or by nourishing scarcities; and can require the blood transfusion. Several countries have banks of the blood in order to fill the requirement for transfusable of the blood. Persona obtaining the blood transfusions it must have a type of the blood compatible with the fact from the donor. Hemophilia will be genetic disease it causes disfunction in one of the mechanisms of the blood being rolled up. This can allow otherwise of inconsequential of wound to be life-threatening, but more commonly it brings k in hemarthrosis, or hemorrhage into joint spaces, which can damage. Substances with exception of oxygen can connect to hemoglobin; in some cases this can cause irreversible damage to the body. Carbon monoxide, for example, is very dangerous after by 4 it is brought down to the blood through legky by inhalation, because carbon monoxide irreversibly connects to hemoblobin in order to form carboxyhemoglobin so that less hemoglobin will freely connect oxygen, and less oxygen can be transported into the blood. This can cause suffocation insidiously. The fire of grief in enclosed to room with the poor ventilation presents very dangerous danger in the form of the fact that it it can create the growth of carbon monoxide in air. Certain carbon monoxide connects to hemoglobin smoking tobacco. The blood for the transfusion is obtained from the human donors by the donation of the blood and is preserved in the bank of the blood. The blood much differently print inside the people, the system of the group of blood ABO, and the system on the machine of the group of the blood of rhesus very important. The transfusion of the blood of the incompatible group of the blood can cause strictly, frequently is fatal, complications; therefore crossmatching is made in order to ensure that the compatible product of blood transfused. After a strict acute loss of the blood, liquid preparations, the ancestral known as expanders of plasma, it is possible to give intravenously, or the permissions of salts (NaCl, kCl, caCl2 etc...) on the physiological concentration, either colloidal permissions, such as dextran, human albumin of serum, or fresh, it is which they froze plasma. In these state of emergencys, the expander of plasma will be more effective procedure on the economy to the life than of the blood transfusion, because metabolism transfused of the cell of the blood does not repeat start immediately after transfusion. In the the most modern of proofs -.osnovanno1 to medicine bloodletting used in control of a little rare diseases, including haemochromatosis and polycythemia. However, they were thought that they were bloodletting and leeching not to be general unvalidated interventions utilized to to y9tyu of century, so much disease are incorrectly must to the surplus the blood, according to hippocratic to medicine. It is must to its importance to the life, the blood connects a large quantity of belief. One of the most basic will be the benefit of the blood as symbol for the family relations; "to be that referred by the blood" to be referred ancestry or descendance, rather than by marriage. This bears closely to bloodlines, and statements such as the "blood to thickness than water" and the "poor blood", also as the "brother of the blood". The blood give the specific attention in the Jewish and Christian religions because Leviticus 17:11 speaks "the life of creature they are located in the blood." This phrase will the aspect of law Levitical forbidding drink the blood, proper to its practice in worship idol by the surrounding societies. Among germanic tribes (such as Anglo-Saxons and Norsemen), the blood was used during their sacrifices; Blуts. It was examined, that had the blood the force of its initiator and after to butcher the blood was sprinkled on the walls, on the statues of gods and on the participants themselves. This act of the blood to splash was caused bleodsian to the old English and terminology was lent Roman Catholic of tserkov church put in order to bless and even when. Hittite word for the blood, ishar was cognate to the words for the "oath" and "fastening", sees Ishara. Ancient Greeks believed that by the blood of gods, ichor, there was mineral which was poisonous to mortals. Some Christian tserkov, including Roman catholicism, eastern Orthodoxy, and branches Anglicanism teach that, after 4 osvyashchano, fault Eucharistic will be actual the material blood jesus. Thus in the blessed wine, jesus will be it dukhovnost and it is physical prisytstvyyushchim. This teaching is implanted in last supper as written in 4 gospels bibles, in which jesus declared to its disciples that bread which they ate was its body, and to fault it was its blood. "this cup will be Novyya precept in my blood, which there will be shed for you." (luke 22:20). Various forms Protestantism, is special that of lineage Wesleyan or Presbyterian, teach that fault no more than the symbol of blood christ, which dukhovnost but it is physical present moment. Theology Lutheran teaches that the body and the blood they be present together "in, s, and under" by bread and by wine Eucharistic feast. It is must to The bibli-.osnovannomu belief, to witnesses jehovah's do not eat the blood or do not accept tranfusions the entire blood or your 4 main components precisely, cell of the blood, white cells of the blood, platelets (thrombocytes), and entire plasma. Terms personally to decide are instructed or not to recognize the part, and medical procedures which include their own blood. In the Chinese culture, is frequently said that if the nose of man produces the fine feed to the blood, then this signifies that it is experienced sexual desire. This frequently seems into the the Chinese -.4zyk and films Hong Kong so, as in the Japanese culture parodied in anime and manga. Natures, mainly man, will be frequently shown and nosebleed if they exactly they saw someone nude either in the smaller clothing or if they had erotic thought or ] different religious fantasy.[20 and, then other groups to falsely be accused of the use of the human blood in the rituals; such accusations as libel of the blood. Libel of the blood against the jews will be most common format of this. Although not there will be ritual including the human blood in the Jewish the law or custom-house, the productions of this nature (frequently including the murder of children) were widely used during the Middle Ages in order to justify anti-Semitic persecution and certain they persisted into the the 2yogo century. Blood of one of that containing in tele- liquids was used in art.[21 ] in particular, the ideas of the Viennese Actionist Hermann Nitsch, Franko b, shelters Lennie, Ron Athey, Yang Zhichao and Kira o ' Reilly together with survey Andres Serrano, was included the blood as is evident visually element. Marc Quinn Made the sculptures of ispol'zuyushch, it was which they froze the blood, including the casting of its own made head of ispol'zuyushch its own blood.
