Cellular respiration is a biochemical process through which cells convert glucose and oxygen into energy in the form of ATP (adenosine triphosphate). This process occurs in distinct stages, including glycolysis, the citric acid cycle, and the electron transport chain. During cellular respiration, waste products such as carbon dioxide and water are produced. This process is crucial for providing energy to support various cellular functions, enabling growth, repair, and maintaining homeostasis. It is essential for all forms of life, including plants and animals.