Tidal volume is air a. inhaled after normal inspiration b. remaining in the lungs after forced expiration c. forcibly expelled after normal expiration d. exchanged during normal breathing

a

Explanation:

Tidal volume (TV) is the volume of oxygen that enters the lungs (inspiration) through normal breathing. It is measured per kg of body mass.

It is also measurement applied by a ventilator machine. The machine delivers oxygen and the amount delivered is calculated as tidal volume.

'Remaining in the lungs after forced expiration' is called Inspiratory Reserve Volume (IRV)

'Forcibly expelled after normal expiration' is called Expiratory Reserve Volume (ERV)

D : exchanged during normal breathing

Explanation:

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