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Related to thick filaments: thin filaments
filament(fil′ă-mĕnt) [L. filamentum, threading]
1. A fine thread.
2. A threadlike coil of tungsten found in the x-ray tube that is the source of electrons.
A filament forming the central axis of the flagellum of a spermatozoon.
intermediate filamentAbbreviation: IF
Slender proteins found in all eukaryotic cells, measuring about 8 to 12 nm in diameter. Intermediate filaments are composed of proteins including desmin, keratins, lamins, and vimentin and together with microtubules and microfilaments form the cytoskeleton. Some malignant cells can be identified by the specific proteins in their intermediate filaments.
Myosin, seen microscopically.
Actin, seen microscopically.