Difference between internal repiaration and external respiaration
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External respiration is the exchange of gases with the external environment, and occurs in the alveoli of the lungs. Internal respiration is the exchange of gases with the internal environment, and occurs in the tissues. The actual exchange of gases occurs due to simple diffusion.
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External Respiration: External respiration refers to the gas exchange across the respiratory membrane of lungs. Internal Respiration: Oxygen diffuses out from the blood into tissue during internal respiration. External Respiration: Oxygen diffuses from alveolar air into the blood during external respiration.
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