Cells which are very active.They need a lot of energy. Cardiac ,muscle cells are some examples
"muscle"
The mitochondria is used for energy in the human body. Having more mitochondria would be beneficial since it would mean that the body would have more energy when needed.
Muscle cells are very active relatively to the skin cell. So it has more mitochondria
They are in active cells. Some like muscle and cardiac cells
There aren't any (you're not a plant); The closest relative would be the mitochondria.
The Human Heart.
Mitochondria
Muscle cells have more mitochondria because they require more energy to contract than skin cells.
Muscle Cells
the muscle
Mitochondria is a structure used to provide energy for the various functions of the human body, so it is a structure.
Mitochondria