theca folliculi

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theca

 [the´kah] (L.)
a case or sheath. adj., adj the´cal.
theca cor´dis pericardium.
theca folli´culi an envelope of condensed connective tissue surrounding a vesicular ovarian follicle; it is composed of an internal vascular layer (theca interna) and an external fibrous layer (theca externa).

the·ca fol·lic·'u·li

the wall of a vesicular ovarian follicle.
See also: tunica externa, tunica interna thecae folliculi.

the·ca fol·lic·u·li

(thē'kă fŏ-lik'yū-lī)
The wall of a vesicular ovarian follicle.
See also: tunica externa

theca

pl. thecae [L.] a case or sheath.

theca cell
an epithelioid cell of the corpus luteum.
theca cordis
pericardium.
theca folliculi
an envelope of condensed connective tissue surrounding a vesicular ovarian follicle, comprising an internal vascular layer (theca interna) and an external fibrous layer (theca externa).
granulosa theca cell tumor
may secrete estrogen and progesterone in dogs and cause persistent or irregular estrus, alopecia, enlargement of nipples and vulva. Uterine changes range from cystic endometrial hyperplasia to pyometra.
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References in periodicals archive ?
39-42) Histologic examination revealed that the vascular density in the theca interna of follicles in VEGF-treated ovaries increased two-fold compared with that in untreated ovaries.
Theca interna was stripped from the follicle wall, and the granulosa cells were removed.
In conclusion, our study showed that miRNAs have played an important role in insulin action in local ovarian theca interna.
Pregnancy luteomas are generally thought to arise from nodular hyperplasia of theca interna cells (theca-lutein hyperplasia), (59,67,69) although others (56) have proposed an origin from stromal cells.
The remaining granulosa and theca interna cells undergo transformations and re-organize to form a corpus luteum, or "yellow body.
Effects of nicotine and cotinine on bovine theca interna and granulosa cells.
Ovulation appears to be the result of a weakening of the follicular wall under the force of modest but steady intrafollicular pressure, which is primarily due to the hydrostatic pressure of capillaries in the theca interna.
The theca interna contains most of the capillaries supplying blood to the follicle.
Characterization of dissimilar steroid productions by granulosa, theca interna and theca externa cells during follicular maturation in the turkey (Meleagris gallopavo).
7,8) In addition, part of the renal tubule, spermatogonia and Leydig cells of the testis, ova, theca externa, and theca interna of the corpus luteum of ovary also expressed PGP9.
The major morphologic changes induced by the LH surge involve transforming the residual granulosa and theca interna cells into large and small luteal cells, respectively (Figure 12-5).
As described earlier, the preovulatory follicle produces estradiol at a very high rate, and this process requires cooperation between granulosa and theca interna cells.