Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
Tidal Volume is the amount of air that moves in or out of the lungs during a normal breath at rest. It's a crucial measurement in respiratory physiology, indicating the efficiency of pulmonary ventilation.
Related terms
Inspiratory Reserve Volume (IRV): The additional amount of air that can be inhaled with maximum effort after a normal inspiration.
Expiratory Reserve Volume (ERV): The extra volume of air that can be forcibly exhaled after the end of a normal tidal expiration.
Residual Volume (RV): The volume of air remaining in the lungs after a maximal exhalation, preventing lung collapse