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What is the benefit of having a large number of alveoli?

Answer and explanation

Correct answer: Providing a large surface area for gas exchange

The governing principle is that diffusion becomes more effective when the available surface area is large. Although each alveolus is tiny, millions of alveoli together provide a very extensive, thin exchange surface with a rich capillary supply. This allows oxygen and carbon dioxide to move rapidly, whereas digestion, blood formation and urine production occur in other organs. Thus option A is correct.

Related tags

AlveoliSurface-AreaGas-ExchangeRespirationLife ProcessesWorld Of LivingScienceClass 10 Mcq

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