View source for Theca folliculi

{{Infobox Anatomy |
  Name         = {{PAGENAME}} |
  Latin        = theca folliculi |
  GraySubject  = |
  GrayPage     = |
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  Caption2     = |
  Precursor    = |
  System       = |
  Artery       = |
  Vein         = |
  Nerve        = |
  Lymph        = |
  MeshName     = |
  MeshNumber   = |
  DorlandsPre  = t_07 |
  DorlandsSuf  = 12801620  |
}}
{{CMG}}



The '''theca folliculi''' comprise a layer of the [[ovarian follicle]]s. They appear as the follicles become [[tertiary follicle]]s.

The theca are divided into two layers: [[theca interna]] and [[theca externa]].

==Theca interna==
Theca interna cells express [[Luteinizing hormone/choriogonadotropin receptor|receptors]] for [[luteinizing hormone]] to produce [[androstenedione]], which via a few steps, gives the [[granulosa]] the precursor for [[estrogen]] manufacturing.

After rupture of the mature [[ovarian follicle]], the theca interna cells differentiate into the theca lutein cells of the [[corpus luteum]]. These cells secrete [[estradiol]].

==Theca externa==
The theca externa is the outer layers of the theca folliculi. They contain abundant [[collagen]] and are mainly supportive.



==External links==
* {{BUHistology|14805loa}}
* {{UCDavisOrganology|Reproductive/mammal/ovary2/ovary5}} - "Mammal, canine ovary (LM, High)"
* {{UCDavisOrganology|Reproductive/mammal/ovary5/ovary6}} - "Mammal, bovine ovary (LM, Medium)"
* {{UIUCHistologySubject|372}} - interna
* {{UIUCHistologySubject|373}} - externa
* {{USCHistology|rep/c_16}}
* {{USCHistology|rep/c_18}}
* {{AnatomyAtlasesMicroscopic|13|249}}
* [http://www.trinity.edu/rblyston/MicroA/Lectures/L39-html/sld016.htm Slide at trinity.edu]


{{Female reproductive system}}

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