Identify and briefly describe the process of cellular respiration that occur in the mitochondria

The transition phage, the second phase of cellular respiration  is usually occur in mitochondria.

The transition stage take place in mitochondria. The pyruvate is combined with NAD+ to form NADH and acetyl co-enzyme molecules.

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.