The Respiratory System

at a Glance

Jeremy Ward, Jane Ward and Richard Leach

Figure 16a Typical changes in ventilation V, arterial PO2 (Pao2), arterial Pco2 (Paco2), arterial pH (pHa), mixed venous Pco2 (Pvo2) and mixed venous Po2 (Pvco2) in a fit young man as oxygen consumption is increased from its resting value of 0.25 L/min to his maximum oxygen consumption of 4 L/mi