Lung volumes

Definition

Volume of air associated with different phases of the respiratory cycle. Lung volumes are critical for assessing lung function and diagnosing respiratory conditions.

5 Must Know Facts For Your Next Test

1. Tidal Volume (TV) is the amount of air inhaled or exhaled during normal breathing.
2. Inspiratory Reserve Volume (IRV) is the additional air that can be inhaled after a normal inhalation.
3. Expiratory Reserve Volume (ERV) is the additional air that can be exhaled after a normal exhalation.
4. Residual Volume (RV) is the amount of air remaining in the lungs after a forced exhalation.
5. Total Lung Capacity (TLC) is the sum of all lung volumes, representing the total amount of air the lungs can hold.

Related terms

Tidal Volume (TV): The volume of air breathed in and out without conscious effort.

Vital Capacity (VC): The maximum amount of air a person can expel from their lungs after a maximum inhalation.

Functional Residual Capacity (FRC): The volume of air remaining in the lungs after a normal tidal expiration.