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Gaseous Exchange

Which is the ...

Question

Which is the end part of pulmonary or lung division and place of gaseous exchange?

A

Bronchiole

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B

Alveolus

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C

Air chamber

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D

Trachiole

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Solution

The correct option is C Alveolus
The alveolar sacs/Alveolus (singular of alveoli) are the ends of the respiratory tree and the site of gaseous exchange. These are sacs made of a single layer of squamous epithelium, similar to the endothelium of the capillaries. Hence, Option B is correct.

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