02 Respiratory System - Lung Volume

Question 1

Tidal Volume (TV)

Answer 1

Amount of air either inhaled or exhaled during a single breath

Question 2

Inspiratory Reserve Volume (IRV)

Answer 2

Amount of air inhaled in excess of normal restful inspiration

Question 3

Expiratory Reserve Volume (ERV)

Answer 3

Amount of air that can be forcefully expelled in excess of normal exhalation at rest

Question 4

Residual Volume (RV)

Answer 4

• Amount of air remaining in the lungs after maximum forced expiration
• Exists because the normal healthy lung is never fully collapsed