Haemoglobin carbon dioxide transport

It is composed of a straw-coloured fluid (plasma) and cells of two different colours - red and white. The red blood cells which account for the colour of blood are made up of minute circular discs which contain red pigment (haemoglobin) with which the oxygen and carbon dioxide transported in the blood combine temporarily. Haemoglobin also combines very readily with carbon dioxide. 

A major part of the buffering capacity of blood is also due to the haemoglobin/oxyhaemoglobin equilibrium and its effect on carbon dioxide transport, but the quantitative treatment of acid-base equilibrium in blood is complicated by the rates of reversible hydration of carbon dioxide (catalysed by carbonic anhydrase) and by the chloride shift from erythrocytes. 

Transport These transport specific compounds from one part of the body to another haemoglobin transports carbon dioxide too and oxygen from the lungs. Cell membranes contain proteins that are responsible for the transport of species from one side of the membrane to the other. 

Direct binding of CO2 to haemoglobin accounts for only about 10 per cent of the physiological transport of CO2. Carbon dioxide binds to both oxy- and deoxyhaemoglobin by interaction with amino groups in the protein to form carbamate groups ... 

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