Biology
Give suitable explanations for the following:
Why does gaseous exchange continue in the lungs even during expiration?
Respiratory System
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Answer
Not all air is expelled from the lungs during expiration. A certain volume of air (about 1500 ml), known as the residual volume, remains in the lungs after a normal breath out. This residual volume maintains some oxygen in the alveoli, contributing to continued gaseous exchange.
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