Answer:
The rate of gaseous exchange in alveoli and blood depends on the difference in pressure of gases in both the alveoli and blood capillaries.
Explanation:
The air in alveoli has high pressure of oxygen and low pressure of carbon-dioxide.
The air in blood vessels has high pressure of carbon-dioxide and low pressure of oxygen
Due to the diffusion, the oxygen from alveoli moves towards to blood capillaries and carbon-dioxide diffuses from blood to alveoli.
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