Physiology of Respiration 2/11/13

Tidal Volume: The volume of air exchanged in one cycle of respiration.

Inspiratory Reserve Volume: The volume of air that can be inhaled after a tidal inspiration.

Expiratory Reserve Volume: The volume of air that can be expired after a tidal expiration.

Residual Volume: The volume of air remaining in the lungs after maximum exhalation.

The volume of air within the conducting passageways that can't be involved in gas exchange (included as a component of residual volume).

Vital Capacity: The volume of air that can be inhaled following a maximal exhalation. It represents the capacity available for speech. (IRV + ERV + TV = VC).

Functional Reserve Capacity: The volume of air remaining in the body after a passive exhalation. (ERV + RV = FRC)

Total Lung Capacity: The volume of air that is involved in a maximal respiratory cycle. (TV + IRV + ERV + RV = TLC).

Inspiratory Capacity: The maximum inspiratory volume of air that is possible after tidal expiration. (TV + IRV)