Mitochondria are the cell structures (organelles) which are responsible for releasing energy from glucose (sugar) in a cell. The number of mitochondria in a cell will depend on how much energy that cell needs. Skin cells basically form a protective layer on the body. They are produced by a layer of cells beneath the skin which divide to produce new cells. The cells above get pushed gradually to the surface. As this happens they become waterproofed by filling with a substance called keratin, and gradually die. So the surface layers of your skin (the bits you can see and touch) are in fact dead cells! As they are dead, they do not need any energy. Cardiac cells are muscle cells found in the heart. Their function is to repeatedly contract, providing the heart with the ability to pump blood around the body. So they will need a continuous supply of energy. If you have read this far, you should now be able to work out which kind of cell has the most mitochondria.
mitochondria
Muscle cells are very active relatively to the skin cell. So it has more mitochondria
Mitochondria is the part of cells that generate energy by turning nutrients and oxygen into fuel for the body. Muscle cells need this ability more because they are constantly working; fat cells do not need it as much.
Muscle cells often contain many mitochondria because muscle cells often require a lot of energy, and since mitochondria create ATP which is the form of energy used by our bodies, it is essential to have many of them in cells that constantly require more energy than, as an example, skin cells.
skin
They are in active cells. Some like muscle and cardiac cells
Muscle cells have thousands more mitochondria.
Muscle cells are very active relatively to the skin cell. So it has more mitochondria
Muscle cells have more mitochondria because they require more energy to contract than skin cells.
mitochondria
"muscle"
Muscles have many mitochondria. It needs much energy for contractions
The muscle cell, as they require more energy than other cells.
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would you expect skin cells to contain more or fewer mitochondria than muscle cell?
Muscles cells require vast amounts more mitochondria, in order to release the ATP energy necessary to contract and help us move.
Mitochondria are more numerous in muscle cells than in skin cells. Mitochondria give the muscle cells energy. Skin cells do not need as much energy to survive.