The role of mitochondria in cellular respiration is crucial, as they are often referred to as the powerhouse of the cell. Mitochondria are responsible for producing adenosine triphosphate (ATP), which provides energy for various cellular processes. In cellular respiration, glucose and oxygen are used to generate ATP through a series of biochemical reactions, primarily during the processes of glycolysis, the citric acid cycle, and oxidative phosphorylation. This energy is vital for maintaining cell function, growth, and metabolism.