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Mitochondria are tiny organelles inside cellsthat are involved in releasing energy from food. This process is known as cellularrespiration.

The mitochondria is called the powerhouse of the cell because it is responsible for producing most of the cell's energy, or adenosine tri-phosphate (ATP). Cells can produce two ATP by breaking down a glycogen molecule, but the mitochondria is able to produce up to 36 ATP in comparison.

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Mitochondria have been described as "the powerhouse of the cell" because they generate most of the cell's supply of adenosine triphosphate (ATP), used as a source of chemical energy .
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