The main buffer system of the human blood is____________?

A. H₂CO₃ – HCO₃
B. H₂CO₃ – CO₃^2-
C. CH₃COOH – CH₃COO^–
D. NH₂CONH₂ – NH₂CONH⁺

¨       H2CO3 – HCO3 is the main buffer system of human blood. It consists of carbonic acid (H2CO3) and its conjugate base, bicarbonate ion (HCO3-). This buffer system helps to maintain a stable pH in the blood by absorbing excess hydrogen ions (H+) or hydroxide ions (OH-) and releasing them when necessary.

Submitted by :- Jamil Ahmed