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follicle
(redirected from thyroid follicles)

   Also found in: Medical, Encyclopedia, Wikipedia 0.01 sec.
fol·li·cle  (fl-kl)
n.
1. Anatomy
a. A small bodily cavity or sac.
b. A crypt or minute cul-de-sac or lacuna, such as the depression in the skin from which the hair emerges.
c. An ovarian follicle.
d. A spherical mass of cells usually containing a cavity.
2. Botany A dry, single-chambered fruit that splits along only one seam to release its seeds, as in larkspur and milkweed.

[Latin folliculus, little bag, diminutive of follis, bellows; see bhel-2 in Indo-European roots.]

follicle  (fl-kl)
1. A small, protective sac, gland, or cluster of cells in the body. In mammals, unfertilized eggs develop in follicles located in the ovaries. Hair grows from follicles in the skin.
2. A dry, dehiscent fruit that develops from a single carpel, has a single chamber, and splits open along only one seam to release its seeds. The pod of the milkweed and the fruit of the magnolia are follicles.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.follicle - any small spherical group of cells containing a cavityfollicle - any small spherical group of cells containing a cavity
vesicle, cyst - a small anatomically normal sac or bladderlike structure (especially one containing fluid)
hair follicle - a small tubular cavity containing the root of a hair; small muscles and sebaceous glands are associated with them
Graafian follicle - a vascular body in a mammalian ovary enclosing a developing egg
Translations
follicle [ˈfɒlɪkl] Nfolículo m
follicle [ˈfɒlɪkəl] nfollicule m
follicle
nFollikel nt
follicle [ˈfɒlɪkl] nfollicolo


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The thyroid follicles are lined with columnar epithelial cells with basally located round nuclei and relatively dense chromatin; the cytoplasm is granular and eosinophilic (figure 2).
Other causes of thyrotoxicosis include excessive production of thyroid hormones from sources outside the thyroid gland and leakage of stored thyroid hormones from storage in the thyroid follicles.
4] increases thyroid stimulating hormone (TSH) output from the pituitary, enhancing uptake of iodide, and increased turnover associated with hyperplasia of the cells of the thyroid follicles.
 
 
 
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