What are the kidneys doing?

Yana Merichenko
Yana Merichenko
July 9, 2014
What are the kidneys doing?

The functions of the kidneys cannot be overestimated: they are vital organs and are involved in many important processes of human life.

The three main functions of the kidneys

  1. Blood filtration. In the human body, the kidneys act as a blood filter, and also remove excess fluid, urea, toxins, creatinine. For the whole day about 1.5 liters of blood passes through the kidneys and excretes from 0.5 liters. up to 2 l. urine.
  2. Maintain a balance of water-salt balance. The kidneys regulate the content of minerals and salts in the blood. In case of their excess, the kidneys help remove them from the body.
  3. Production of biological substances. The following hormones are formed in the kidneys:
    • Erythropoietin is a hormone that stimulates the intake of vitamin B12, iron and copper in the bone marrow. An increase in this substance in the blood increases blood pressure and increases blood viscosity;
    • Thrombopoietin is a protein produced by the liver and kidneys, it stimulates the number of platelets produced by the bone marrow;
    • Calcitriol is a processed form of vitamin D.Acts as a regulator of the exchange of potassium and phosphate. A lack of calcitriol production in a child’s body can cause rickets.

Also in the kidneys are synthesized amino acids and easily digestible vitamin D3 from vitamin D. This active form of the vitamin is necessary for proper breakdown and absorption of calcium from the gastrointestinal tract.

Control of sodium concentration in the blood

During the month, the kidneys are able to offset the daily need for sodium. This feature is important when you need to reduce the amount of salt consumed. Therefore, when patients are recommended to have a salt-free diet, it does not harm their health (but this diet should be followed no longer than 40 days and strictly under the supervision of a physician).

Now you know what the kidneys are doing. It is also good to know what they look like. Each kidney weighs no more than 200 g. The kidneys are small in size: 10–12 cm in length, 5–6 cm in width, and 4 cm in thickness, resemble beans in shape. The kidneys are located on the right and left sides of the spine, with one slightly lower than the other.

The nature has rewarded people with so strong kidneys that even if they will function by 20%, it will allow to support the vital activity of the organism.Our well-being, blood composition, the state of the bone marrow and the organism as a whole depend on the kidneys. These small but very significant organs must be preserved and kept as long as possible.


Date: 09.10.2018, 23:26 / Views: 75163

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