The tidal volume is
the amount of air that moves in or out of the lungs during any one normal breathing cycle
The tidal volume is the volume of air that moves in and out of the lungs with each breath during normal breathing. It is the amount of air that is inspired or expired during a single breath. Tidal volume is an important parameter in respiratory physiology as it represents the minimum amount of air required to maintain adequate oxygenation and removal of carbon dioxide in the body. In healthy adults, the average tidal volume is approximately 500 mL per breath, but it can vary with age, gender, body size, and physical activity levels. In some respiratory disorders such as asthma or chronic obstructive pulmonary disease (COPD), the tidal volume may be reduced due to increased airway resistance or obstruction, which can lead to breathing difficulties.
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