Carbon dioxide in human blood is carried out in the form of-

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Sodium bicarbonate. Carbon dioxide in human blood is carried out in the form of bicarbonates. About 7% of carbon dioxide transported is dissolved in plasma. About 23% loosely binds with haemoglobin as carbaminohemoglobin in the form of bicarbonates and about 70% reacts with water forming carbonic acid in erythrocytes in the presence of enzyme carbonic anhydrase. Carbonic acid is soon converted into H+ and HCO3 - (bicarbonate) ions. This HCO3 - ion comes out of RBCs and combines with Na+ and K+ to form bicarbonates of these ions. Sodium and potassium bicarbonates account for 70% of total CO2 transportation of the body. CO2 + H2O + Na2CO3 2NaHCO3 (Sodium bicarbonates) CO2 + H2O H2CO3 (Carbonic acid)

Carbon dioxide in human blood is carried out in the form of-

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