mitochondrion
/ˌmaɪtəˈkɑndriən/
noun
- A small part inside a cell that produces most of the cell's energy.
- Under a microscope, you can see the folded inner membrane of a mitochondrion.
- Muscle cells contain many mitochondria because they need a lot of energy.
- Each mitochondrion acts like a tiny power plant for the cell.
Synonyms