This process happens in the mitochondria by the way, so anyways in this cycle glucose gets broken down all the way from pyruvate to hydrogen.
Are we done?
Now it's time for the electron transport chain, NADH and FADH2 carry electrons to the chain, Oxygen is the last receptor. ATP, which is energy, is heavily produced in this part of cellular respiration.
When will my suffering end?
Almost. So just to clarify, after the Krebs cycle there are byproducts which are water and carbon dioxide. And from glycolysis you get NAD+ which later on becomes NADH. Also if you were wondering what ATP was made of, it is from a process called ATP synthase where ADP and Phosphate are combined.