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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.
Keratin is a fibrous protein found naturally in the hair. It acts as a protective shield against humidity, the primary cause of frizz. Over time, the hair loses keratin from exposure to the sun, the environment, styling and chemical services. Porous spots develop in this damaged hair, much like potholes in a road.