Vital Fluid – Blood

The cells of our body are washed by a number of bodily fluids, or humors, which make up the so-called internal environment. These fluids originate from blood plasma and are formed by filtering the plasma through the capillary vessels of the circulatory system. Blood plasma produces bodily fluids such as vitreous fluid, anterior chamber fluid, perilymph, cerebrospinal fluid, coelomic fluid, tissue fluid, blood, and lymph.

An adult man contains from 5 to 6 liters of blood, and a woman from 4 to 5. Every day this amount of blood passes through the heart more than 1000 times.

Since fluids occupy an intermediate position between the external environment and cells, they play the role of a shock absorber during sudden external changes and ensure the survival of cells. In addition, they are a means of transporting nutrients and waste products.

Blood is an internal environment inherent in humans and vertebrates. It consists of 50% water and contains many substances and cells:

1. Blood plasma. This is the liquid component of blood, which contains blood cells and dissolved oxygen, carbon dioxide, mineral salts, glucose and proteins.

2. Erythrocytes, or red blood cells. Contain hemoglobin - a red respiratory pigment.

3. Leukocytes, or white blood cells. Perform protective functions.

4. Thrombocytes, or blood platelets. Necessary for blood clotting.