Muscle cells make up muscle tissues, which are attached to each other and to bones. The main function of muscle cells is to move body parts and organs. They do this by contracting and relaxing, which changes the length and shape of the cells. This process uses several proteins and requires a lot of energy.

Which is the best prediction about the cell structures of muscle cells?
A.
Muscle cells have a large volume of cytoplasm so that the cell can easily change shape.
B.
Muscle cells are surrounded by cell walls so that they are strong enough to move bones.
C.
Muscle cells contain a large number of mitochondria in order to provide more energy.
D.
Muscle cells do not have nuclei because they do not need to produce proteins.