what is the significance of residual volume of air in the lungs?
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The residual volume is the amount of air that is left after expiratory reserve volume is exhaled. The lungs are never completely empty. ... Residual volume is also important for preventing large fluctuations in respiratory gases (O2 and CO2).
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The significance is that the lungs are never completely empty while the process of breathing which gives some time to the oxygen to be absorbed and carbon dioxide to be eliminated.
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