theca

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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

, pl.

the·cae

(thē'kă, thē'sē),
A sheath or capsule.
[G. thēkē, a box]

theca

/the·ca/ (the´kah) pl. the´cae   [L.] a case or sheath.the´cal
theca folli´culi  an envelope of condensed connective tissue surrounding a vesicular ovarian follicle, comprising an internal vascular layer (tunica interna) and an external fibrous layer (tunica externa) .

theca

(thē′kə)
n. pl. the·cae (-sē′, -kē′)
A case, covering, or sheath, such as the covering of the pollen sacs of an anther or the thick cell wall of certain dinoflagellates.

the′cal (-kəl) adj.

theca

[thē′kə] pl. thecae,
a sheath or capsule, such as the theca cordis or pericardium.

the·ca

, pl. thecae (thē'kă, -sē)
A sheath or capsule.
[G. thēkē, a box]

theca

A casing, outer covering or sheath.

theca

  1. a sheath or case.
  2. the protective sheath surrounding the GRAAFIAN FOLLICLE.
  3. an obsolete term for ASCUS.

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.
References in periodicals archive ?
The members of the Gothograptus lineage are characterized by tubaria tapering distally, most of them by a well-developed appendix, and singular genicular hoods as well as characteristic features of the proximal end, and thecae (e.
Concerning the content, the reader finds a thorough study of the late Phoenician tradition of inhumating the dead in thecae and anthropoid sarcophagi.
The fertile stamen develops from the inner stamen whorl and is petaloid with the thecae located on the adaxial surface and the connective extending above the region of pollen production.
The anthers are typically caudate, with the pollen-bearing anther thecae extending below the attachment point of the filament (i.
Florets dimorphic; marginal florets female with staminodes, corolla tubular-funnelform, deeply fourlobed; central florets bisexual or male with a rudimentary ovary, corolla tubular-funnelform, deeply five-lobed; anther apical appendages rounded to acute, basally constricted and demarcated from the thecae, basally auriculate with tails very short, smooth to slightly papillose; style bilobed, dorsally papillose.
Although they have four pollen sacs, organized into two thecae, each theca opens by a single valve, which is hinged on the ventral side of the theca (Fig.
The anthers have awned appendages, which gradually narrow from the thecae, and the filaments are variously papillose to hairy.