The common name for the process of cellular respiration is often referred to simply as respiration. This biological process involves converting nutrients, primarily glucose, into usable energy in the form of ATP. Respiration occurs in aerobic conditions (with oxygen) as well as anaerobic conditions (without oxygen), leading to different end products. In aerobic respiration, carbon dioxide and water are produced alongside ATP, while anaerobic respiration results in substances like lactic acid or ethanol. Understanding respiration is vital as it underpins energy production in living organisms.