According to the State University of New York, the major products released during cellular respiration are carbon dioxide, water and energy in the form of ATP molecules. These are all generated in several steps in the progressive breakdown of glucose molecules through reactions with oxygen and other molecules.
The State University of New York states that there are three major stages of cellular respiration. The first is glycolysis, which breaks a single glucose into two molecules known as pyruvate without needing oxygen. This process produces a net of two ATP molecules. Two more ATP molecules are produced in the next step, the citric acid cycle. Finally, oxidative phosphorylation produces 32 ATP molecules along with water and carbon dioxide.