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  4. The vital capacity of lungs is equal to

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Q. The vital capacity of lungs is equal to

JIPMERJIPMER 2004

Solution:

The vital capacity is the maximum amount of air that can be expelled from lungs by forced exhalation after a forced inhalation. It is equal to the sum of tidal volume (TV), inspiratory reserve volume (IRV) and expiratory reserve volume (ERV).
$VC = TV + IRV + ERV$
$=500+3000+1100$
$=4600\, ml$