What is defined as the air inhaled or exhaled during one quiet breath?

Tidal volume is the term used to describe the amount of air that is inhaled or exhaled during one quiet breath. It represents the normal breathing volume for an individual at rest, usually measured in milliliters. Understanding tidal volume is crucial for assessing lung function and is a fundamental concept in respiratory physiology.

Vital capacity refers to the maximum amount of air a person can exhale after taking a deep breath, while inspiratory reserve volume is the additional air that can be inhaled after a normal inhale. Residual volume is the amount of air that remains in the lungs after maximal exhalation. These volumes play significant roles in determining lung health and function, but they are not indicative of the air exchanged in a single, quiet breath like tidal volume is.