Regulation of hydrogen ion concentration.
D000136:Acid-Base Equilibrium; D000138:Acidosis / Q000209:etiology; D000471:Alkalosis / Q000209:etiology; D001639:Bicarbonates / Q000502:physiology; D002021:Buffers; D002245:Carbon Dioxide / Q000502:physiology; D006454:Hemoglobins / Q000502:physiology; D006801:Humans; D006863:Hydrogen-Ion Concentration; D010710:Phosphates / Q000502:physiology
D001639:Bicarbonates; D002021:Buffers; D006454:Hemoglobins; D010710:Phosphates; D002245:Carbon Dioxide