The Process of External Respiration PiO2 159mmHg Pulmonary ventilation PO, 102mImHg PCO, 40m/mH Pulmonary gas exchange Pao,40mmHg PaCo246mmHg PvO2 100mmHg Pv CO 40mmHs g5 The Process of External Respiration Pulmonary gas exchange PiO2 159mmHg PAO2 102mmHg PACO2 40mmHg Pulmonary ventilation PaO2 40mmHg PaCO2 46mmHg PvO2 100mmHg PvCO2 40mmHg