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Question
Give suitable explanation for the following :
Why does gaseous exchange continue in the lungs even during expiration?
Solution
Gaseous exchange continues in the lungs even during expiration because expiration is the result of reverse movements of the ribs and diaphragm. As a consequence of the movements of the ribs and the diaphragm, the thoracic cavity is diminished and the lungs are compressed, forcing the air out into the atmosphere.
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