Question

What is the residual volume of air and give its uses

Answer 1

The residual volume(RV) is the amount of air that is left after expiratory reserve volume is exhaled. The lungs are never completely empty. ... Therefore, there is always some air remaining in the lungs. Residual volume is also important for preventing large fluctuations in respiratory gases (O2 and CO2).

Answer 2

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During the breathing cycle, when air is taken in and let out, the lungs always contain a residual volume of air so that there is sufficient time for oxygen to be absorbed and for the carbondioxide to be released.

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