Differentiate between IRV and ERV.
IRV It is the inspiratory Reserve volume which is the maximum volume of air that can be in held after a normal inspiration. Its value is around 2500 -3500 mL. ∙ ERV It is the expiratory reserve volume which is the maximum amount of air that can be exhaled out after a normal exhalation. Its value is around 1000-1100 mL.
