Mitochondria
Mitochondria (plural of mitochondrion) are organelles (small specialized structures in cells) found abundantly in cells and are responsible for biochemical processes such as respiration and energy production. These rod-shaped are main power generators of cellular energy, converting oxygen and nutrients into ATP (adenosine triphosphate), a chemical energy source that powers metabolism. Mitochondria have their own separate genetic material, a separate genome from the DNA located in the cell body.