About 20% of human blood exists in organs such as liver and spleen. In the case of blood loss, these stored blood will quickly replenish blood volume without affecting normal blood circulation and blood pressure.
An adult weighing 60 kg has a blood volume of about 4,800 ml, and each person donates 200-400 ml according to the regulations, accounting for only about 5% of the total blood volume. The lost blood will be replenished in a short time, so it will not affect the body.
The human blood is constantly metabolized all the time. Even if you don't donate blood, the blood cells in your body will age and die and become blood waste. Regular and moderate blood donation can enhance human immunity and disease resistance, stimulate bone marrow hematopoietic organs, promote human metabolism and prolong life.
At the same time, regular and appropriate blood donation can alleviate hyperviscosity and reduce blood viscosity, which has certain positive significance for preventing cardiovascular and cerebrovascular diseases.
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