Explanation
The amount of air that moves in and out of the lungs with each normal inspiration and expiration is called Tidal Volume. Therefore, the correct answer is option C.
Tidal volume is the volume of air that is inhaled and exhaled during normal breathing, without any extra effort or exercise. It represents the amount of air that enters and exits the lungs with each breath.
Residual volume is the amount of air that remains in the lungs after a maximal expiration, which cannot be voluntarily exhaled. It is important for maintaining lung function and preventing lung collapse.
Vital capacity is the maximum amount of air that can be exhaled after taking the deepest breath possible. It is the sum of tidal volume, inspiratory reserve volume, and expiratory reserve volume.
Tidal capacity is not a commonly used term in respiratory physiology, and it is not a valid answer option.
