Food is a form of energy stored in chemical form. Energy storage is the capture of energy produced at one time for use at a later time.
Decomposition is the process by which organic substances are broken down into simpler organic matter. Mitochondrion is the cell organelle that converts the chemical energy stored in food into compounds that are more convenient for the cell to use. This process is called cellular respiration in which energy in the form of ATP is produced to drive cellular processes.
