Respiratory volumes

Total lung capacity

Total amount of air the lungs can contain

Forced vital capacity

Total exhaled air, from maximum inhalation to maximum exhalation

Tidal volume

Air in or out during normal breathing

Tidal volume

Amount of air inspired or expired during normal respiration

Functional residual capacity

Amount of air remaining in the lungs after a normal expiration

Residual volume

Amount of air still in lungs after a maximal expiratory effort.

Inspiratory reserve volume

Amount of air that can be forcefully inspired above and beyond that taken in during normal respiration

Inspiratory reserve volume

At the end of a normal breath in, inhale as deeply as possible, this is known as the:

Expiratory reserve volume

At the end of a normal breath out, exhale as deeply as possible, this is known as:

Vital capacity

Maximal amount of air that can be forcefully expired after a maximal inspiration.

Expiratory reserve volume

Maximal amount of air that can be forcefully expired following a normal expiration.

Inspiratory capacity

Maximal amount of air that can be inspired after a normal expiration.

Forced expiratory volume

Volume of air expelled in the first second of a forced exhalation