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keratin filaments. Definitions: 1. a class of intermediate filaments that form a network within epithelial cells and anchor to desmosomes, thus imparting tensile strength to the tissue. Synonyms: cytokeratin filaments. The definition information for keratin filaments is provided by Stedman's.
Microfilaments, or actin filaments, are the thinnest filaments of the cytoskeleton and are found in the cytoplasm of eukaryotic cells. The polymers of these linear filaments are flexible but still strong, resisting crushing and buckling while providing support to the cell. Microfilaments are very versatile cell components that serve a role in cytokinesis, movement, and changes in cell shape.