Split reins are a piece of equipment used for communicating with a horse while it is being ridden. Split reins are actually two separate, individual reins that are used together, with one rein on each side of the horse's neck.
As discussed above, mitochondria are the sites of respiration, and generate chemical energy in the form of ATP by metabolizing sugars, fats, and other chemical fuels with the assistance of molecular oxygen.
What is the purpose of the mitochondria in a plant cell? Mitochondria derive energy for all cells, plant or animal, in which they reside. They are the aerobic energy-derivers of eukaryotic cells.