They combine these two reactants to produce these products. So the sugar molecule, as well as oxygen that we then breathe and use on the electron transport chain in the process of aerobic cellular respiration. So essentially, when we ingest these carbohydrates, which are produced by plants, for instance, when we ingest bread products or pasta products and so forth, we essentially ingest carbohydrates which are derived and produced by plants. And so once we ingest these carbohydrates, our body breaks down these carbohydrates into their individual monomer sugars. And if this monomer sugar is not a glucose molecule, we typically transform that into a glucose molecule because it's the glucose that we use in the process of glycolysis and aerobic cellular respiration to basically produce the high energy ATP molecules that we use inside our body. And if we already have too many of these ATP molecules, if we have enough, the glucose can be stored in the form of glycogen for later use.