Carbon dioxide can be transported in the blood by all of the following methods, EXCEPT

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Carbon dioxide (CO2) is transported in the blood in several ways, including being carried in plasma as bicarbonate ions (HCO3-), dissolved directly in plasma as CO2, and bound to hemoglobin. However, it is not transported as carbon monoxide (CO) within red blood cells. CO is a different molecule from CO2 and has distinct properties and effects on the body, including a high affinity for hemoglobin, which can be toxic.

Carbon Dioxide Can Be Transported in the Blood by All