What is the amount of air that moves in and out of the chest in one normal breathing cycle called?

The amount of air that moves in and out of the chest in one normal breathing cycle is referred to as tidal volume. Tidal volume represents the volume of air that is inhaled or exhaled during normal, relaxed breathing. This measurement is essential for assessing respiratory function and identifying potential respiratory issues, as it reflects the lung capacity used during standard breathing.

Vital capacity, on the other hand, refers to the total amount of air that can be forcibly exhaled after a maximum inhalation and includes tidal volume along with the inspiratory reserve volume and expiratory reserve volume. Minute volume is the total volume of air inhaled or exhaled in one minute, calculated as tidal volume multiplied by the respiratory rate. Inspiratory capacity indicates the maximum amount of air that can be inhaled after a normal expiration, which is distinct from tidal volume. Each of these terms relates to lung function but measures different aspects of respiratory mechanics.