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.
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What is the correct answer to this question?
Providing a large surface area for gas exchange
Why is this the correct answer?
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.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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