Physiology Respiratory System Pa 2 946008c3 Normal pO2 in venous blood is: A 40 mmHg B 60 mmHg C 80 mmHg D 95 mmHg High-Yield Explanation pO2 of the aerial blood = 95 mmHg pO2 of venous blood = 40 mmHg pCO2 of the aerial blood = 40 mmHg pCO2 of venous blood = 45 mmHg