Catabolism is the breakdown of complex substances to their constituent parts (glucose, amino acids and fatty acids) which form substrates for metabolic pathways.
Carbon dioxide is produced by oxidizing glucose, a carbohydrate.
Oxygen, which is reduced to water, serves as the electron acceptor.
ATP and heat are produced when the chemical bond energy of glucose is released.
Carbon dioxide and water are the byproducts of the catabolism of glucose.
Glycolysis and the TCA cycle totally oxidize glucose to CO2 and water.