Question

what's difference between external and internal atmospheric pressures ?explain briefly​

Answer 1

Answer:

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.

Explanation:

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Answer 2

Answer:

1,2,3,4,5,

Explanation:

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