Question

describe the mechanism of gaseous exhange in tissue and lungs

Answer 1

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The primary function of the respiratory system is to exchange oxygen and carbon dioxide. Inhaled oxygen enters the lungs and reaches the alveoli. The layers of cells lining the alveoli and the surrounding capillaries are each only one cell thick and are in very close contact with each other.



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Answer 2

Answer:

Gaseous exchange in humans occurs through diffusion.

• In lungs, oxygen from alveolar air diffuses into blood vessels surrounding the capillaries and carbon dioxide from blood is given out into lungs.

• This oxygen is carried to the tissues and it diffuses from the blood vessels into the tissues.