Metabolism: The release of energy from food occurs in two stages. In the first stage, when complex molecules are broken down or decomposed into simpler ones. In the second stage, when the simpler food components (example- glucose) are oxidized in cytoplasm and mitochondria using oxygen of the air into CO2 and H2O and releasing an ample amount of energy. The second stage involves respiration, where oxygen is breathed in and CO2 is exhaled by the body. The most interesting and remarkable aspect of the process of nutrition is that many of the chemical reactions involved in it are basically the … Continue reading Write a short note on Metabolism?