What are the lungs for?
It is well known that the human body can not exist without oxygen, which is supplied from the outside through the lungs.
The lungs are needed by the human body in order to absorb the oxygen in the air, which subsequently gets into the bloodstream and spreads throughout the body. Then, again, through the lungs, a person exhales carbon dioxide and the whole cycle repeats anew. Hence, the main function of the lungs is gas exchange.
However, this is not the only function; in addition, the lungs are actively involved in maintaining the acid-base balance in the body and the excretion of substances from the body, such as ethers and aromatic substances. The answer to the question of why the lungs are needed would not be complete without mentioning another important function, namely, the lungs are actively involved in regulating the body's water balance - with their help about half a liter of water is derived. And in extreme situations (for example, with hyperthermia), this figure can reach ten liters.
As you can see, the lungs perform important functions in the human body.
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