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Functions of the Blood
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Functions of the Blood

Functions of the blood are important and various. Practically all of them are associated with the circulation of the blood in blood vessels. That is why the main function of the blood is transport function. There are several types of it:

Respiratory function (transport of gases: O2 from the lungs to tissues, CO2 from tissues to the lungs).

Trophic function (transport of nutrients from gastro-intestinal tract and other organs to all the tissues of the organism).

Excretory function (transport of metabolic products to the excretory organs).

Regulatory function (transport of hormones and biologically active substances from endocrine glands to aim-organs).

Protective function (transport of phagocytes and immunoglobulins).

Thermoregulatory function (transport of heat from organs that maintain warmness – liver and other internal organs to the skin).

Besides, pathogenic factors are transported with blood: microorganisms, toxins, tumor cells. Transport of the last one will lead to the development of metastasis of malignant tumor.

Except the transport function, blood plays an important role in maintaining homeostatic features of the organism. That is why the second important function of the blood is homeostatic function. There are several types of it:

Maintenance of the constant chemical content and physical properties of the blood (osmotic pressure, pH, temperature, concentration of ions and other).

Maintenance of the constant volume of the circulating blood.

Maintenance of the antigenic homeostasis.

The third, important function of the blood is creative function. Macromolecules, which are transported with blood, perform intercellular information transferring, which provides regulation of intracellular processes of protein synthesis, keeping the level of cell differentiation, renovation and maintenance of tissue structure.



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