Now, in our discussion on hemorrglobin, we mentioned one important enzyme, namely carbonic anhydrase. And we said that it was carbonic anhydrase that essentially speeds up and allows the conversion of carbon dioxide into its polar form, namely bicarbonate ions. And this is exactly what allows us to actually store the carbon dioxide inside our blood plasma. So carbonic anhydrates essentially hydrates. So it combines carbon dioxide with water to produce carbonic acid. And carbonic acid, being a relatively strong acid, will dissociate into these two polar ions, hydrogen ions and bicarbonate ions.