<prompt> Most important buffer system in human blood:BicarbonatesChloridesHbPhosphates  <response>: Ans. a Bicarbonates; Ref. Ganong, Physiology, 21st ed., 736; Satyanarayan, Biochemistry 2nd ed. - 525PRINCIPAL BUFFERS IN BODY FLUIDSBlood1. H2CO3 K H HCO-3 Bicarbonate buffer most predominant buffer of ECF. especially blood plasma.2. HProt K H Prot- HHb K H Hb- Protein buffer3. H2PO4 - KH- HPO42- Phosphate bufferInterstitial fluid1. H2 CO3 K H HCO-3Intracellular fluid1. HProt K H HCO 32. H2PO4 - KH- HPO42- 