The respiratory system helps in gas exchange from "summary" of Human Biology by Cecie Starr,Beverly McMillan
The process of gas exchange in the human body is essential for survival. The respiratory system plays a crucial role in this process by allowing oxygen to enter the body and carbon dioxide to be eliminated. When we inhale, air enters the body through the nose or mouth and travels down the trachea into the lungs. Within the lungs, the air passes through a network of tiny air sacs called alveoli. These alveoli are surrounded by capillaries, where the actual exchange of gases takes place. Oxygen from the air diffuses from the alveoli into the bloodstream, where it binds to hemoglob...
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