Question

Describe the mechanism by which breathing occur in human being including inspiration and expiration

Answer 1

Explanation:

when we take oxygen and enter to lung. lung have air sacs that helps exchange of gases.

these air sacs also called alveoli.

these alveoli are riched supplied with blood in veins.

when oxygen enter in alveoli, the veins take oxygen and give carbon dioxide. the waste co2

goes out of the body. the carbon dioxide come out from veins and oxygen gone in veins

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