In a normal breathing cycle, tidal volume is primarily measured during which action?

Tidal volume refers to the amount of air that is inhaled or exhaled during a normal breathing cycle. It encompasses the volume of air exchanged both during inhalation and exhalation. By measuring tidal volume in this way, one can assess the efficiency and effectiveness of a person's respiratory function as they breathe in and out.

During inhalation, the lungs expand, allowing oxygen-rich air to enter, whereas during exhalation, the lungs contract, releasing carbon dioxide-rich air. Since tidal volume includes the air entering the lungs during inhalation and the air leaving the lungs during exhalation, it is essential to evaluate both actions to obtain an accurate measurement of tidal volume. Therefore, considering both phases provides a comprehensive understanding of lung function and overall respiratory health.