And what carbonic anhydrase does is it combines a single water molecule with a single carbon dioxide gas molecule to produce H, two Co three in the aqueous state. And this is our carbonic acid. Now, because carbonic acid is a weak acid, it will dissociate into these two ions, into an H plus ion and into bicarbonate. And because these two ions have a charge, they will be soluble in our water, in our blood plasma. And so we see that inside our body, we actually store carbon dioxide in the form of this equation because these are essentially soluble in our water while carbon dioxide is not. So once again, exercising tissue has a high rate of metabolism and therefore produces a large number of carbon dioxide.