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What is the advantage of having a very large number of alveoli in human lungs?

Answer and explanation

Correct answer: A much larger surface area is available for gas exchange

The governing concept is surface area and diffusion. Each alveolus has a thin moist wall, and millions of alveoli together create a very large exchange surface. Oxygen can therefore diffuse efficiently into surrounding capillaries, while carbon dioxide diffuses out. Option A is correct; digestion, urine storage and transport to leaves are not functions of lung alveoli.

Related tags

AlveoliSurface-AreaGas-ExchangeLife ProcessesWorld Of LivingScienceClass 10 Mcq

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