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In alveoli of the lungs, the air at the ...

In alveoli of the lungs, the air at the site of gas exchange, is separated from the blood by

A

alveolar epithelium only

B

alveolar epithelium and capillary endothelium

C

alveolar epithelium, capillary endothelium and tunica adventitia

D

alveolar epithelium, capillary endothelium, a thin layer of tunica media and tunica adventitia

Text Solution

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The correct Answer is:
B
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