Sports science in English
from A to Z

The metabolism of our cells produces waste products that should be discarded. The organs performing this function are:

• the lungs, which excrete carbon dioxide;
• the kidneys, which eliminate water and a few chemical substances, especially salts;
• the intestine, which eliminates the substances that are not absorbed during digestion through the rectum;
• the skin, which eliminates water and minerals (as the kidneys).