Functions of blood in the human body

For scientists have always remained a mystery functionblood in the human body. This secret is still being solved, since the slightest deviations or violations of these functions lead to the death of a person in the shortest possible time.

Functions of blood in the body are very diverse. The main functions of the blood are in the transport of substances and the transfer of oxygen. Circulating through blood vessels, it carries a considerable amount of useful substances to the body, in particular, oxygen, which is so necessary for the "breathing" of every cell of all living things. Also, blood carries around the body useful substances that dissolve in our body as a result of eating. From these and many other functions of blood in the body depends on the health of everyone and his daily health. But do we often think about what we eat, what we drink and in general, what we breathe? Probably, not everyone will give a positive answer to this question.

Many of our diseases are caused by the fact that we do notalways take our way of life seriously. Therefore, let us consciously approach this issue and think about what the functions of blood and how they affect the body.

Slightly more than half (approximately 55%)accounts for the proportion of water in the blood. This transparent liquid is called a plasma and has a pale yellow color. The remaining 45% falls on the share of occupied blood. Red blood cells are called erythrocytes, white cells are leukocytes. Still there are in the blood and blood platelets, which are called platelets. The color of our blood directly depends on the presence of hemoglobin in it. Hemoglobin is a pigment that is saturated with oxygen and has a scarlet color. Flowing from the lungs into the heart along the arteries, hemoglobin is most saturated with oxygen and, spreading through all tissues of the body, it has a rich red color. Then the blood returns back to the heart from the tissues of the body through the veins, and here it already has a darker color. hemoglobin already practically lacks oxygen. After that, the blood again gets into the lungs, thus acquiring a scarlet color. it is saturated with another portion of oxygen, and the process repeats itself.

And what is plasma?

Plasma is an aqueous solution in whichthere are both positively and negatively charged particles - sodium, potassium, chlorine, magnesium, and the quantitative and qualitative composition of these ions is like the composition of sea water. Also in the plasma there are nutrients, metabolic results, proteins, vitamins, hormones. They are about 10%, and the rest is water.

Depending on the needs of the body, the amountand the formation of blood cells in the organs of hematopoiesis is constantly monitored and regulated. What are the functions of blood, and, accordingly, its main components - erythrocytes, leukocytes and platelets?

Erythrocytes prevail among the components thatcirculate in the blood. Hemoglobin fills the erythrocytes very tightly. The functions of erythrocytes are to carry oxygen and carbon dioxide in the blood vessels. Erythrocytes are vital components for us in the process of respiration and, accordingly, the absorption of oxygen by us from the external environment.

What are the leukocytes? They are a kind of "protectors" of our body from various infections that penetrate into the blood. Periodically breaking down, cells form unnecessary remains in the body, which leukocytes also process. Leukocytes are divided into monocytes, lymphocytes and granulocytes.

The functions of blood in the body are extremely important. This is primarily the provision of each cell with all important substances and the release of waste products and removal to the outside. Only five liters of liquid are used for this, which ensure our vital functions.