Responsibilities of the basic components of blood

Blood plasma primarily supplies to all cells of the body food for metabolism. Important it contains proteins - 8% of its weight. It also dissolved the final and intermediate products of metabolism (metabolites)that it brings to the excretory organs, and substance-regulators that are affecting various organs. Among important metabolites plasma contains carbon dioxide (CO2), continuously deliver blood to the lungs for excretion from the body. If it had been simply dissolved in the plasma, 100 m3 his blood would be placed only 3 cm3. Meanwhile, the blood contains 100 m3 of about 50 cm3 of this gas. What are the properties of plasma make it so roomy? Plasma contains substances type of soda, able to connect chemically large quantities of carbon dioxide. So, soda can exist in two forms. In the tissues, where those who came to him the blood saturated with carbon dioxide, soda goes in the form NaHCO3; here one atom of sodium have one group of carbonic acid. When the blood comes into the light, soda spends half of its carbon dioxide as carbon dioxide exhaled by us, and becomes a form Na2C03. It is the presence in the blood of substances such as soda, members of the so-called buffer systems, allows you to transfer from the tissues to the lungs large quantities of carbon dioxide.
Erythrocytes, although sometimes called red blood bulbs, in fact resemble flat slices with pressed-in the middle, i.e. biconcave lenses. Their dimensions are insignificant: diameter equal to 7 microns. This means that 1 mm would fit a chain of 140 erythrocytes. 1 mm3 blood is normal 4-4,5 million red blood cells. In volume pinhead them will be 15 million If all the red blood cells of one person put in a row, chain them three times will encircle the globe at the equator or will take about one third of the route the Earth - Moon.
Erythrocytes are essential for the body - they carry out the respiratory function of blood, being the carriers of oxygen. They contain a special connection with iron protein called hemoglobin, and gives blood its red color. A remarkable property of hemoglobin is its ability to give an unstable compound with oxygen. Where there are a lot of oxygen hemoglobin connected to it. Where there is little oxygen, hemoglobin gives it. Thanks to the hemoglobin in the blood is quite exceptional "capacity for oxygen. 100 cm3 would have dissolved only 0.3 cm3 of oxygen. Meanwhile hemoglobin binds to 20 cm3 of this gas. Through the hemoglobin, the blood contains virtually the same amount of oxygen as it has in the atmospheric air. After all, in the air of oxygen 20-21 %. Therefore, contact with blood completely replaces in all cells of the body, the need of contact with air.
Tiny size of red blood cells when they are a huge number of great significance to their functions. The total surface of erythrocytes one person is 3400 m2. Thus it facilitates oxygenation of blood and return it to the fabric.
Unfortunately, hemoglobin can connect not only with oxygen. Carbon monoxide poisoning is that this gas is associated with hemoglobin. He is "no longer releases" and deprive the blood opportunities to contact with oxygen. Therefore, carbon monoxide is very dangerous, and must at the first signs of poisoning immediately move to fresh air, in order to save the rest of hemoglobin from blocking poison.
Red blood cells are different from all other body cells that Mature't have nuclei. In this regard, they are short-lived. It is believed that they do not live more than 4 months. Then every day die 1/3120 part of all of our red blood cells, i.e. more than 175 billion, and therefore the same should be formed. Erythrocytes are produced in the bone marrow, which, like other authorities, conducting nervous system. When violations of its activities, for example in connection with mental injury, sometimes there has been a violation of formation of red blood cells. Such cases are indicated by the famous Russian doctor. S. P. Botkin. His name, along with the names of I. M. Sechenov and I. P. Pavlova is among the founders of the doctrine of eminent role of the nervous system in our body - exercises, dubbed the nervism.
As for the production of hemoglobin necessary delivery of iron, its presence in the diet is very important. Contains iron in meat, fruits, vegetables. People suffering from anemia, i.e., a reduced number of red blood cells and hemoglobin, give medications that contain iron, preparations of liver, in which there are chemical agents that contribute to the blood.

  • Leukocytes