A network of protein fibers within the cytoplasm that supports cell structure, cell and organelle movement, and cell division.

Microfilaments: Muscle contraction, cytokinesisEg, actin, microvilli

Intermediate filaments: Maintain cell structureEg, vimentin, desmin, cytokeratin, lamins, glial fibrillary acidic protein (GFAP), neurofilaments

Microtubules: Movement, cell divisionEg, cilia, flagella, mitotic spindle, axonal trafficking, centrioles