Q48 of 367 Page 48

How are lungs designed in human beings to maximise the exchange of gases?

To maximize the exchange of gases, lungs have millions of alveoli which provides a larger surface area for the exchange of gases.


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Why do the walls of trachea not collapse when there is less air in it?

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How are oxygen and carbon dioxide exchanged in our body during respiration?

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Give the main points of difference between respiration in plants and respiration in animals.

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Describe the exchange of gases which takes place in the leaves of a plant (a) during daytime, and (b) at night.