22.4 Gas Exchange – Anatomy & Physiology
Gas Exchange. Gas exchange occurs at two sites in the body: in the lungs, where oxygen is picked up and carbon dioxide is released at the respiratory membrane, and at the tissues, where oxygen is released and carbon dioxide is picked up. External respiration is the exchange of gases with the external environment, and occurs in the alveoli of the lungs.
DA: 49 PA: 27 MOZ Rank: 82