In a birds, which organ gets inflated on inspiration?

Lungs

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Air sacs

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Air capillaries

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All of the above

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Solution

The correct option is C Air sacs
The avian respiratory system delivers oxygen from the air to the tissues and also removes carbon dioxide. In addition, the respiratory system plays an important role in thermoregulation (maintaining normal body temperature). The avian respiratory system is different from that of other vertebrates, with birds having relatively small lungs plus nine air sacs that play an important role in respiration (but are not directly involved in the exchange of gases).

So, the correct option is 'Air sacs'.

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