The inspiratory reserve volume (IRV) indicates the maximal amount of additional air that can be drawn into the lungs by determined effort after normal inspiration, whereas the expiratory reserve volume (ERV) represents the additional amount of air that can be expired
The inspiratory reserve volume (IRV) indicates the maximal amount of additional air that can be drawn into the lungs by determined effort after normal inspiration, whereas the expiratory reserve volume (ERV) represents the additional amount of air that can be expired