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Q.

Where does gas exchange occur in the human respiratory system?

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a

In the ventricle 

b

Across the walls of Alveoli 

c

In the lungs

d

In the nostrils 

answer is B.

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Detailed Solution

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  • Alveoli are microscopic balloon-like structures embedded with capillaries that allow respiratory gaseous exchange via diffusion. Each lung contains approximately 300 million alveoli that are involved in respiratory gaseous exchange.
  • The air we breathe enters the lungs via the windpipe and is then exchanged across the alveolar walls.
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