<prompt> Functional residual capacity represents the volume of air remaining in lungsAfter forceful expirationAfter forceful inspirationAfter normal inspirationAfter normal expiration  <response>: Functional residual capacity Functional residual capacity is the volume of air remaining in the lungs after expiration of a normal breath Normal value - 2.5 L Residual volume Expiratory reserve volume Ref:- Ganongs Review of Medical Physiology 25th ed; pg num:- 629 