Blood is a carbonate buffer, the components of buffer and PH range will be

Blood is a carbonate buffer system composed of carbonic acid (H₂CO₃) and bicarbonate ions (${\mathrm{HCO}}_3^{-}$). The equilibrium reaction for this buffer system is:

H₂CO₃ ⇌ H⁺ + ${\mathrm{HCO}}_3^{-}$

The pH range for this buffer system in blood is 7.26 to 7.42, which is slightly alkaline. The bicarbonate ion acts as a weak base, and the carbonic acid acts as a weak acid to regulate the pH of the blood by either accepting or donating hydrogen ions.