Transport of CO2

Transport of CO2 in Dissolved state Accounts for 7% of all the CO2 normally transported At PCO2 of venous blood 2.7 ml/dl At PCO2 of arterial blood 2.4 ml/dl i.e. 0.3 ml of CO2 is transported in the form of dissolved CO2 by each dl of blood

Transport as bicarbonate ions Accounts for 70% of CO2 transport from cells/ Tissues to lungs. CO2 + H2O H2 CO3 H + HCO3 H +Hgb HHgb Cl Cl Plasma { C.A + - RBC + - -

Transport as carbamino Hb Accounts for 23% of CO2 transport from cells to lungs CO2 + Hgb HgbCO2 Or CO2 +Plasma Proteins P.PCO2

Haldane Effect Binding of oxygen with hemoglobin tends to displace carbon dioxide from the blood OR Deoxygenated blood at any given PCO2 binds appreciably more CO2 than does the oxygenated blood.