Krebses, or Krebs cycle, is a series of chemical reactions that occur in the cells of living organisms. It plays a crucial role in cellular respiration, where energy is produced from nutrients. This cycle takes place in the mitochondria, the powerhouse of the cell, and helps convert carbohydrates, fats, and proteins into energy in the form of ATP (adenosine triphosphate). The Krebs cycle is named after the biochemist Hans Krebs, who discovered it in the 1930s. It involves several steps, including the conversion of acetyl-CoA into carbon dioxide and high-energy electron carriers. These carriers, such as NADH and FADH2, are essential for the next stage of energy production in the electron transport chain.