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.
It is bounded by two sets of membranes, a smooth outer one and an inner one that is arranged in folds, or cristae, that extend into the interior of the mitochondrion, called the matrix. Mitochondria provide the principal source of cellular energy through oxidative phosphorylation and adenosine triphosphate synthesis. They also contain the enzymes involved with electron transport and the citric acid and fatty acid cycles.
A cell may contain a few hundreds to five one hundred thousand mitochondria. Function: They help in cellular respiration. Food is oxidized in the mitochondria and energy is produced in the form of ATP (Adenosine triphosphate).Mitochondria are, therefore,popularly known as the power house of the cell.