Question

During breathing cycle, what is the advantage of residual volume of air in lungs?​

Answer 1

Answer:

The residual volume functions to keep the alveoli open even after maximum expiration. In healthy lungs, the air that makes up the residual volume is utilized for continual gas exchange to occur between breaths.

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Answer 2

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The energy necessary to re-inflate the lungs would be extremely large. 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).

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