How Is Residual Volume Different From Functional Residual Capacity?
Answers
Answer:
Functional Residual Capacity (FRC) is the volume of air present in the lungs at the end of passive expiration. At FRC, the opposing elastic recoil forces of the lungs and chest wall are in equilibrium and there is no exertion by the diaphragm or other respiratory muscles.
Residual Volume (RV): Volume of air remaining in the lungs even after a forceful expiration. It is approximately 1100 ml. It means that we cannot empty our lungs even forcefully.
Functional Residual Capacity (FRC): Volume of air that remains in the lungs after normal expiration. It includes residual volume and expiratory reserve volume (FRC = RV + ERV). It is approximately 2200 ml.
*ERV is Expiratory Reserve Volume
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