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What is the advantage of having many alveoli in the lungs?

Answer and explanation

Correct answer: Surface area for gas exchange increases

The governing concept is the relationship between surface area and diffusion. Alveoli are numerous, thin-walled air sacs surrounded by capillaries. Their large combined surface provides more area across which oxygen diffuses into the blood and carbon dioxide diffuses out. This makes gas exchange rapid and efficient, so option A is correct. Digestion, urine formation, and bile storage occur in different organs and are not functions of alveoli.

Related tags

AlveoliSurface AreaGas ExchangeLife ProcessesWorld Of LivingScienceClass 10 Mcq

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