Physiological Buffers
The bicarbonate (HCO3-) and the phosphate systems are the most important buffers in human physiology
pH of blood is carefully maintained within very narrow limits (within 0.1 of 7.4) by buffers. Buffers in blood include: H2CO3/HCO3-, amino acids and proteins
Lungs and kidneys are the major organs responsible for the control of pH in the body fluids.