Life Processes

Question

How are the alveoli designed to maximise the exchange of gases?

Answer

Alveoli are designed to maximise the exchange of gases in the following way:
(i) The alveoli are thin walled and richly supplied with a network of blood vessels to facilitate exchange of gases between blood and the air filled in alveoli.
(ii) Alveoli have balloon like structure. Thus, provide maximum surface for exchange gases.

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