What are the types of cytoskeletal fiber?

"The cytoskeleton is the cellular organelle present in the cytoplasm. It is a complex network of structures with varying sizes. Cytoskeleton gives shape to the cell and also provides support to it. The cytoskeleton is also important for cellular movement and also the response of the cell to stimuli. There are three types of cytoskeleton which include: microtubule, intermediate filaments, and microfilaments.

Microtubules are straight, hollow, and tubular. Microtubules are formed by bundles of a globular protein called tubulin. Intermediate filaments are the structures that form a network around the nucleus and extend to the periphery of the cell.

Intermediate filaments are divided into five substances which include: Keratins (in epithelial cells), Glial filaments (in astrocytes), Neurofilaments (in nerve cells), Vimentin (in many types of cells), and Desmin (in muscle fibers). Microfilaments are long and fine thread-like structures with a diameter of about 3 to 6 nm. The microfilaments present in the ectoplasm contain only actin molecules; microfilament provides the cell with resistance against pulling forces."

There are different primary types of fibers that are available. These three are actin filaments, microtubules, and finally, intermediate filaments. They will also have some differences in terms of their appearance. These different structures of the fibers are going to be important because they will make sure that the various cells will be able to keep their shape.

For example, microfilaments will be protein−like fibers. They would be about 3−6 nm in diameter. Actin filaments, on the other hand, will be able to occur in different cells that are in bundles. They will also be parallel. Microtubules will form part of the cytoskeleton and will be very long. They can be effective for the improvement of eukaryotic cells.