Where does gas exchange occur?

Question

Accepted Answer

B. Respiratory zone

1. One zone only moves air about.
2. The other is where oxygen actually crosses.
3. The gas exchange occurs in the respiratory zone.
4. So the answer is the respiratory zone.
_Source: OpenStax 'Anatomy and Physiology 2e', Ch 22 'The Respiratory System'_

Answer

Retaining zone

Answer

Regulatory zone

Answer

Refractory zone

Where does gas exchange occur?

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