Cytoskeletons serve a similar purpose to bones. They determine their shape, and size. They serve a purpose as a muscle, by making up the contractile portion of muscles, and helping cells move. The cytoskeleton is made up of various proteins. The two most important ones are the microtubules and actin. Microtobulesare made up of tubulin subunits, and are used to hold cells shape. Microtubules make up several other parts of the cell such as cilia and flagella. Actin subunits make up microfilaments, which change the shape of the cell as well as hold the structure.
Another protein in the cytoskeleton is the cellular motor
that acts as motors to move the cell along. Two groups of these are mytosin
and kinesin. Myosin is a motor that moves actin filaments, which in turn
move the cell. Kinesin is a microtubule motor that moves vesicles along
microtobules. Cells also move both ERs and the golgi appartatus. The cytoskeleton
also acts in the process of cell division. This occurs when a parent cell
and a prophase combine to form a metaphase. In the metaphase, chromosomes
aling at the equator. Once they are aligned, they separate to form daughter
cells. The daughter cells are an identical pair of cells that will go through
the same cycle later.
