| Term | Definition |
|
Tidal Volume |
The amount of air that enters the lungs in a single inhalation or leaves the lungs in a single exhalation of quiet breathing. |
|
Inspiratory reserve volume (IRV) |
the air that can be forcibly inhaled after a normal respiration has taken place. |
|
Expiratory reserve volume (ERV) |
The amount of air that can be forcibly exhaled after a normal quiet respiration. |
|
Residual Volume (RV) |
The air remaining in the lungs after a forced exhalation; about 1500 cc in the adult. |
|
Inspiratory capacity (IC) |
the volume of air inhaled after a normal exhale. |
|
Functional residual capacity (FRC) |
The air that remains in the lungs after a normal exhalation has taken place. |
|
Vital Capacity (VC) |
The total volume of air thatt can be exhaled after a maximum inhalation. This amount will be equal to the sum of TV, IRV, and ERV. |
|
Total lung capacity (TLC) |
The volume of air in the lungs after a maximal inhalation. |