theca


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Related to theca: theca folliculi

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).
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

the·ca

, pl.

the·cae

(thē'kă, thē'sē),
A sheath or capsule.
[G. thēkē, a box]
Farlex Partner Medical Dictionary © Farlex 2012

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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

the·ca

, pl. thecae (thē'kă, -sē)
A sheath or capsule.
[G. thēkē, a box]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

theca

A casing, outer covering or sheath.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

theca

  1. a sheath or case.
  2. the protective sheath surrounding the GRAAFIAN FOLLICLE.
  3. an obsolete term for ASCUS.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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References in periodicals archive ?
The theca of post-ovulatory follicles was continuous with the epithelial cell layer lining the ovigerous lamellae.
Atresia and Apoptosis in Pre- and Postovulatory Follicles of Sharptooth Catfish (Clarias gariepinus, Burchell, 1822)
AR has been primarily localized in the theca interna cells of preantral follicles, granulosa cells of preantral and antral follicles, and both theca and granulosa cells of dominant follicles [104].
Genetic Variants Associated with Hyperandrogenemia in PCOS Pathophysiology
Very few macrophages are seen in the stroma and theca layer of the stromal embedded follicle.
Polycystic Ovarian Condition May Be a Risk Factor for Ovarian Tumor Development in the Laying Hen Model of Spontaneous Ovarian Cancer
Diffuse, usually weak TNF-[alpha] expression was seen in theca layer compared with the control group.
Anti-inflammatory Effect of Silymarin on Ovarian Immunohistochemical Localization of TNF-[alpha] Associated with Systemic Inflammation in Polycystic Ovarian Syndrome/Efecto Antiinflamatorio de la Silimarina en la Localizacion Inmunohistoquimica Ovarica del TNF-[alpha] Asociado con la Inflamacion Sistemica en el Sindrome de Ovario Poliquistico
Granulose cells, gc; theca cells, tc; and connective tissue, ct.
Hypothyroidism Reduces the Size of Ovarian Follicles and Promotes Hypertrophy of Periovarian Fat with Infiltration of Macrophages in Adult Rabbits
Recent studies have shown that HGF can suppress apoptosis in ovarian granulosa cells and mediates the positive feedback loop between theca cells and granulosa cells, which can promote the dramatic cell growth required for folliculogenesis [41, 42].
Mesenchymal Stem Cells in Restoration of Fertility at Experimental Pelvic Inflammatory Disease
Meantime, this can lead to abnormal proliferation or excessive apoptosis of follicular cells such as the high LH dependent theca cellular proliferation [67] and follicular atresia induced granulosa cell inactivation [68-70] in PCOS and depletion of oocytes pool in premature ovarian failure [71].
A Network Pharmacology Approach to Explore the Pharmacological Mechanism of Xiaoyao Powder on Anovulatory Infertility
Hyperreactio luteinalis (HL) refers to moderate to marked cystic enlargement of the ovaries due to multiple benign theca lutein cysts.
Hyperreactio luteinalis with partial molar pregnancy
However, many studies indicate that GDF9 and BMP15 have critical roles in ovarian architecture of most species and are essential factors for adequate follicular development, interfering considerably in the function, growth and formation of granulosa and theca cells during the growth of the follicle (Vitt and Hsueh, 2001; Otsuka et al., 2011).
Role of growth differentiation factor 9 and bone morphogenetic protein 15 in ovarian function and their importance in mammalian female fertility--a review
Expression of this gene has been reported in testes, ovarian theca cells, and H295 adrenal carcinoma cells (19).
Association of DENND1A Gene Polymorphisms with Polycystic Ovary Syndrome: A Meta-Analysis
A layer of cells (Theca folliculi) was first appearing with spindle-shaped nucleoli and was enveloped of each oocyte (Fig.3, e).
Evaluation the quality of the oil waste histological changes in the ovaries of the whipfin fish, Gerres filamentosus (Cuvier, 1829) during the reproductive cycle in the Hurghada Red Sea, Egypt

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