Vital capacity is the sum of which lung volumes?

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Multiple Choice

Vital capacity is the sum of which lung volumes?

Explanation:
Vital capacity is the maximum amount of air you can forcefully exhale after taking the deepest possible breath. It equals the sum of tidal volume (air moved during a normal breath), inspiratory reserve volume (extra air you can inhale beyond tidal), and expiratory reserve volume (extra air you can exhale beyond tidal). Residual volume is the air left in the lungs after a maximal exhale and cannot be expelled, so it is not included in vital capacity. That’s why the correct description is the sum of tidal volume, inspiratory reserve volume, and expiratory reserve volume.

Vital capacity is the maximum amount of air you can forcefully exhale after taking the deepest possible breath. It equals the sum of tidal volume (air moved during a normal breath), inspiratory reserve volume (extra air you can inhale beyond tidal), and expiratory reserve volume (extra air you can exhale beyond tidal). Residual volume is the air left in the lungs after a maximal exhale and cannot be expelled, so it is not included in vital capacity. That’s why the correct description is the sum of tidal volume, inspiratory reserve volume, and expiratory reserve volume.

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