Mitochondria

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Mitochondria(-singular, mitochondrion) is a membrane bound cell organelle.In 1890 Richard Altmann established them as cell organelles and called them bioblasts. The term mitochondria was coined by Carl Benda in 1898.Both plants and animals will contain mitochondria.

It is a rod shaped organelles It contains two membranes. Outer membrane is smooth where as inner membrane is folded.The folds of mitochondria are called as cristae. The cristae of mitochondria increases the surface area due to which more energy can be produced.

They generate power by converting oxygen and nutrients into ATP. ATP is the chemical energy "currency of the cell" that powers the cells metabolic activities.This process is called aerobic respiration and the reason animals breath oxygen.

1. Without this organelle higher animals would likely not exist because their cells would only be able to obtain energy from anaerobic respiration.
2. In-fact mitochondria enables cells to produce 15times more ATP than they would otherwise need large amount of energy in order to survive

Mitochondria is a semi autonomous body as it contains its own DNA and ribosomes.The inner, folded membrane of mitochondria also contains ribosomes which is why it can synthesize its own proteins.