respiratory volume or capacity

Inspiratory Reserve Volume (IRV)

The volume of air that you can forcibly inhale above and beyond tidal volume.

Tidal Volume (TV)

The volume of air that moves in and out of the lungs during one normal breath.

Functional Residual Capacity (FRC)

The amount of air in the lungs at the end of a normal tidal volume exhalation.

Residual Volume (RV)

The volume of air remaining in the lungs after forceful exhalation that can not be exhaled.

Vital Capacity (VC)

The total amount of air that can be moved in and out of the lungs.

Total Lung Capacity (TLC)

The amount of air in the lungs at maximal inflation.

Pulmonary Ventilation

Movement of respiratory gases (in the air) between the atmosphere and the alveoli of the lungs

Alveolar Gas Exchange (External Respiration)

Exchange of respiratory gases between the alveoli and the blood

Gas Transport

Transport of respiratory gases within the blood between the lungs and the systemic cells

Systemic Gas Exchange (Internal Respiration)

Exchange of respiratory gases between the blood and the systemic cells