tonofibril

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tonofibril

 [ton´o-fi″bril]
one of the fine fibrils in epithelial cells, thought to give a supporting framework to the cell.

ton·o·fi·bril

(ton'ō-fī'bril),
One of a system of fibers found in the cytoplasm of epithelial cells. See: cytoskeleton, tonofilament.

tonofibril

/tono·fi·bril/ (ton´o-fi″bril) a bundle of fine filaments (tonofilaments) in certain cells, especially epithelial cells, the individual strands of which traverse the cytoplasm in all directions and extend into the cell processes to converge and insert on the desmosomes.

tonofibril

[ton′əfī′bril]
Etymology: Gk, tonos, stretching, fibrilla, small fiber
a bundle of fine filaments found in the cytoplasm of epithelial cells. The individual strands, or tonofilaments, spread throughout the cytoplasm and extend into the intercellular bridge to converge at the desmosome. The system of fibers functions as a supportive element within the cytoskeleton. In keratinizing epithelium the strands are the main precursor of keratin. Also called epitheliofibril, tenofibril. See also keratohyalin.

ton·o·fi·bril

(ton'ō-fī'bril)
One of a system of fibers found in the cytoplasm of epithelial cells.
See also: cytoskeleton

ton·o·fi·bril

(ton'ō-fī'bril)
One of a system of fibers found in the cytoplasm of epithelial cells.

tonofibril

one of the fine fibrils in epithelial cells, thought to give a supporting framework to the cell.
References in periodicals archive ?
The reported ultrastructural features of PCE include the presence of microvilli, lacy cytoplasm, and abundant tonofibrils.
The exact percentage of glassy cells needed to make the diagnosis of GCC is not well established, but it may range from 30% to 100%[1,9] Ultrastructurally, glassy cells may show intermediate filaments, polyribosomes, tonofibrils, and desmosomes.
Few primitive desmosomes and sparse tonofibrils were rarely observed.