17.4 Transport of Gases

Blood is the medium of transport for O2 and CO2. About 97 per cent of O2 is transported by RBCs in the blood.

The remaining 3 per cent of O2 is carried in a dissolved state through the plasma.

Nearly 20-25 per cent of CO2 is transported by RBCs whereas 70 per cent of it is carried as bicarbonate. About 7 per cent of CO2 is carried in a dissolved state through plasma.

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