Nearly 70% of ${{CO}_{2}}$ enters the RBCs and react with water to form carbonic acid in the presence of enzyme carbonic anhydrase. This dissociates to form bicarbonate ions, which are circulated by plasma.
Nearly 70% of ${{CO}_{2}}$ enters the RBCs and react with water to form carbonic acid in the presence of enzyme carbonic anhydrase. This dissociates to form bicarbonate ions, which are circulated by plasma.