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प्रश्न
Give suitable explanation for the following :
Why does gaseous exchange continue in the lungs even during expiration?
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उत्तर
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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