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Question

The transfer of oxygen between air in the lungs and blood vessels takes place at the


A

Alveoli

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B

Pharynx

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C

Diaphragm

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D

Trachea

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Solution

The correct option is A

Alveoli


Lungs have numerous air sacs called alveoli. They are rich in blood vessels and have a very thin membranous layer through which exchange of gases takes place.


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