Carbon dioxide is transported in blood more readily than oxygen because carbon dioxide is 20 times more soluble
than oxygen in plasma. The amount of carbon dioxide in the blood (carbon dioxide content) is described as ml CO2
per 100 ml blood (or volume %).
The CO2 content of arterial blood (CaCO2) is 48 vol%; the CO2 content of venous blood (CvCO2) is 52 vol%.
Therefore, each time blood circulates through the body, 4 vol% of carbon dioxide is removed from the tissues and
delivered to the lungs to be exhaled.