Cytoskeleton Microtubules

Cytoskeleton Microtubules 

The cytoskeleton is composed of protein fibers that determine the shape of a cell without cell walls. It primarily provides for movement of cells, for the structural support, movement organelles within the cell and the framework for moving and separating chromosomes during cell division. The three types of protein fibers in the cell are thick microtubules,  thin microfilaments, and medium sized intermediate filaments. Microtubules structure are hollow tubes that assemble from subunits made out of the protein tubulin. Cell subunits are assembled into microtubules by microtubule organizing centers found in many locations inside the cell, in particular, eukaryotic cells have a microtubule organizing center near the nucleus which is known by the name of the centrosome.  The centrosome during cell division span the particular microtubes call the spindle apparatus which separates chromosomes and divides then between the two new daughter cells.