Question

Very high number of alveoli present in a lung is meant for

A

More space for increasing volume of inspired air

B

More area for diffusion

C

Making the organ spongy

D

Increasing nerve supply

Hard

Solution

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Correct option is B)

The structural organization of the lung is meant to maximize its surface area to increase gas diffusion. Due to the enormous number of alveoli (approximately 300 million in each human lung), the surface area of the lung is very large (75 m). The large surface area increases the amount of diffusion.
So, the correct answer is option B.

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