EMBRYOLOGY
RESPIRATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the definition of RESIDUAL VOLUME?
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The volume of air breathed in (or out) during a normal breath at rest
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The volume of air that remains in the lungs after a maximal expiration
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The additional air that can be forcibly inhaled after the inspiration of a normal tidal volume
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The additional air that can be foribly exhaled after the expiration of a normal tidal volume
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Explanation:
Detailed explanation-1: -Residual volume (RV) is the volume of air remaining in the lungs after maximum forceful expiration. In other words, it is the volume of air that cannot be expelled from the lungs, thus causing the alveoli to remain open at all times.
Detailed explanation-2: -The volume of air which remains in the lungs after a normal expiration is called Functional Residual Capacity. It is equals to the expiratory reserve volume and residual volume i.e, RC = ERV + RV.
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