The cytoskeleton is a network of protein filaments that provides structure, shape, and support to the cell. It also plays a crucial role in cell movement, division, and transport of materials within the cell.

Here are the key components of the cytoskeleton:

* Microtubules: These are hollow tubes made of the protein tubulin. They provide structural support, help with cell division, and act as tracks for the movement of organelles and vesicles.

* Microfilaments: These are solid rods made of the protein actin. They are involved in cell shape, muscle contraction, and cell movement.

* Intermediate filaments: These are tough, rope-like structures made of various proteins. They provide structural support and help to anchor organelles within the cell.

So, while the cytoskeleton isn't a single, rigid surface, it acts as a network of supporting structures that give the cell its shape and rigidity.