1. 7% is dissolved in blood
2. 23% is bound to globin protein in hemoglobin (called carbaminohemoglobin) on red blood cell (RBC)
3. 70% is the bicarbonate ion made on the red blood cell (RBC) and than transferred to the blood. (Note as the bicarbonate ion leaves the RBC a cloride ion comes onto the RBC from the blood to balance the charges)
Click here for a video explaining CO2 transport in the blood
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