What is the function of the cytoskeleton?
It supports the cell, maintains its shape, and functions in cell motility. It is composed of microtubules, microfilaments, and intermediate filaments.
Microtubules are hollow rods made up of polymerized tubulin that radiate throughout the cell and provide it with support. They provide a framework for organelle movement within the cell. Cilia and flagella are specialized arrangements of microtubules that extend from certain cells and are involved in cell motility and cytoplasmic movement.
Microfilaments are solid rods of actin, which are important in cell movement as well as support. Muscle contraction, for example, is based on the interaction of action with myosin. They move materials across the plasma membrane, for instance, in the contraction phase of cell divison and in amoeboid movement.