sebaceous follicle


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Related to sebaceous follicle: Sebaceous glands, sebum

follicle

 [fol´ĭ-k'l]
a sac or pouchlike depression or cavity. adj., adj follic´ular.
atretic ovarian follicle an involuted ovarian follicle.
dental follicle the structure within the substance of the jaws enclosing a tooth before its eruption; the dental sac and its contents.
gastric f's lymphoid masses in the gastric mucosa.
graafian follicle see graafian follicle.
hair follicle one of the tubular invaginations of the epidermis enclosing the hairs, and from which the hairs grow.
Diagram of a hair follicle showing layers of hair schematically. From Copstead, 1995.
lymph follicle (lymphatic follicle)
2. lymphatic nodule (def. 2).
Naboth's f's (nabothian f's) Naboth's cysts.
ovarian follicle the ovum and its encasing cells, at any stage of its development.
primary ovarian follicle an immature ovarian follicle consisting of an immature ovum and the few specialized epithelial cells surrounding it.
primordial ovarian follicle an ovarian follicle consisting of an ovum enclosed by a single layer of cells.
sebaceous follicle a hair follicle with a relatively large sebaceous gland, producing a relatively insignificant hair.
solitary f's
1. areas of concentrated lymphatic tissue in the mucosa of the colon.
2. small lymph follicles scattered throughout the mucosa and submucosa of the small intestine. Called also solitary glands.
thyroid f's discrete cystlike units filled with a colloid substance rich in iodine; they constitute the lobules of the thyroid gland.
vesicular ovarian follicle graafian follicle.

sebaceous follicle

Etymology: L, sebum, sweat, folliculus, small bag
a sebaceous gland that opens into a hair follicle.

follicle

(fol'i-kl) [L. folliculus, little bag]
A small secretory sac or cavity. follicular, adjective

atretic follicle

An ovarian follicle that has undergone degeneration or involution.

dental follicle

1. The connective tissue structure that encloses the developing tooth within the substance of the jaw before tooth eruption.
2. The dental sac and its contents.

gastric follicle

The glands in the gastric mucosa of the stomach.

graafian follicle

See: graafian follicle

hair follicle

An invagination of the epidermis that forms a cylindrical depression, penetrating the corium into the connective tissue that holds the hair root. Sebaceous glands, which secrete sebum, and tiny muscles (arrectores pili), which cause the hair to stand, are attached to these follicles.

lymphoid follicle

A densely-packed, spherical or ovoid aggregation of B lymphocytes that forms a lymphocyte proliferation and maturating zone in a lymphoid tissue, such as a lymph node.
Synonym: lymph follicle

maturing follicle

See: graafian follicle

nabothian follicle

A dilated cyst of the glands of the cervix uteri.

ovarian follicle

A spherical structure in the cortex of the ovary consisting of an oogonium or an oocyte and its surrounding epithelial (follicular) cells. The follicles are of three types. The first type, or primary follicle, consists of an oogonium and a single layer of follicular cells. In the second type, or growing follicle, cells proliferate, forming several layers, and the first maturation division occurs. The third type, the vesicular (graafian) follicle, possesses a cavity (antrum) containing the follicular fluid (liquor folliculi). The oocyte lies in the cumulus oophorus, a mass of cells on the inner surface. The cells lining the follicle constitute the stratum granulosum. The follicle is a secretory structure producing estrogen and progesterone.
See: corpus luteum

primordial follicle

An ovarian follicle consisting of the ovum enclosed in a single layer of cells.

sebaceous follicle

Sebaceous gland..

solitary follicle

A single lymph nodule in the intestine.

thyroid follicle

A spherical or oval subunit of the thyroid gland, made of cuboidal epithelium, which contains colloid and the thyroglobulin and iodine from which thyroxine and triiodothyronine are synthesized.

vesicular follicle

A follicle containing a cavity; a mature ovarian (graafian) follicle.

follicle

a sac or pouchlike depression or cavity.

atretic follicle
an involuted ovarian follicle.
conjunctival follicle
focal accumulations of hypertrophied lymphoid tissue in conjunctiva, indicative of an inflammatory reaction.
cystic follicle
ovarian follicle that has not ruptured, is grossly enlarged, may be multiple and on both ovaries. Caused by insufficient luteinizing hormone. Affected cows may be nymphomaniac in behavior, but most are anestrous and anovulatory. See also cystic ovarian degeneration.
dental follicle
the structure within the substance of the jaws enclosing a tooth before its eruption; the dental sac and its contents.
dominant follicle
in the ovary, hormones secreted by the largest follicle will cause others to regress.
gastric follicle
lymphoid masses in the gastric mucosa.
graafian follicle
a maturing ovarian follicle among whose cells fluid has begun to accumulate, leading to the formation of a single cavity and leaving the ovum located in the cumulus oophorus; called also vesicular ovarian follicle.
hair follicle
see hair follicle.
hemorrhagic follicle
see corpus hemorrhagicum.
lymph follicle, lymphatic f
1. a small collection of actively proliferating lymphocytes in the cortex of a lymph node.
2. a small collection of lymphoid tissue in the mucous membrane of the gastrointestinal tract; such collections may occur singly (solitary lymphatic follicle) or closely packed together (aggregated lymphatic follicles).
ovarian follicle
the ovum and its encasing cells, at any stage of its development.
primary ovarian follicle
an immature ovarian follicle consisting of an immature ovum and the few specialized epithelial cells surrounding it.
primordial follicle
an ovarian follicle consisting of an ovum enclosed by a single layer of cells.
sebaceous follicle
a hair follicle with a relatively large sebaceous gland, producing a relatively insignificant hair.
solitary follicle
1. areas of concentrated lymphatic tissue in the mucosa of the colon.
2. small lymph follicles scattered throughout the mucosa and submucosa of the small intestine. Called also solitary glands.
thyroid follicle
discrete cystlike units filled with a colloid substance, constituting the lobules of the thyroid gland.
vesicular ovarian follicle
graafian follicle.
wool follicle
site of origin of wool fiber.
References in periodicals archive ?
acnes than cleanser formulations, and this may be especially relevant on the back where there is less sebum to solubilize benzoyl peroxide particles, a necessary step for penetration into sebaceous follicles," said Dr.
Acne is caused by an enlargement of the sebaceous follicles, which contain oil-producing sebaceous glands, the root cause of acne.
Additional histology studies revealed that the Sebacia Treatment preferentially targeted the sebaceous follicles and glands.