In the expiratory flow volume loop shown below, what is the vital capacity:
Ans. (d) 4.5 liters(Ref. Guyton and Hall Physiology Review, 3rd ed/p.127)In the graph, residual volume (RV) is 1 LTotal lung capacity (TLC) is 5.5 LVital capacity is TLC-RV=4.5L
1 liter
5.5 liters
3 liters
4.5 liters
Respiratory System