Mitochondria is one of the cell organelles present within the cells of the body system. Mitochondria is a site where cellular respiration occurs. Respiration leads to the generation of energy. Mitochondria leads to energy generation in the form of Adenosine Triphosphate (ATP). The energy generated is supplied to various internal organs like muscles and tissue so that they can perform their functions. The energy the body uses to perform various functions is generated from the mitochondria. Mitochondria supplies enough energy to support all vital functions the body performs. Even the smallest cell needs energy which is supplied by the mitochondria. For this reason, it's called the Powerhouse of the cell.