Theca externa

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Theca externa
Details
Identifiers
Latin tunica externa thecae folliculi
FMA 18657
Anatomical terminology
[edit on Wikidata]

The theca externa is the outer layer of the theca folliculi. It is derived from connective tissue, the cells resembling fibroblasts, and contains abundant collagen.[1] During ovulation, the surge in luteinizing hormone increases cAMP which increases progesterone and PGF2α production. The PGF2α induces the contraction of the smooth muscle cells of the theca externa, increasing intrafollicular pressure. This aids in rupture of the mature oocyte, or immature oocyte at the germinal vesicle stage in the canine, along with plasmin and collagenase degradation of the follicle wall.

References

  1. ^ Sadler, T. W. (2008). Langmans embryologi (2. ed.). Copenhagen: Munksgaard Danmark. p. 33. ISBN 9788762805088.

External links

  • Histology image: 14805loa – Histology Learning System at Boston University
  • Anatomy photo: Reproductive/mammal/ovary2/ovary5 - Comparative Organology at University of California, Davis - "Mammal, canine ovary (LM, High)"
  • Anatomy photo: Reproductive/mammal/ovary5/ovary6 - Comparative Organology at University of California, Davis - "Mammal, bovine ovary (LM, Medium)"
  • UIUC Histology Subject 373 - externa
  • Anatomy Atlases - Microscopic Anatomy, plate 13.249
  • Slide at trinity.edu


Retrieved from "https://en.wikipedia.org/w/index.php?title=Theca_externa&oldid=849696074"
This content was retrieved from Wikipedia : http://en.wikipedia.org/wiki/Theca_externa
This page is based on the copyrighted Wikipedia article "Theca externa"; it is used under the Creative Commons Attribution-ShareAlike 3.0 Unported License (CC-BY-SA). You may redistribute it, verbatim or modified, providing that you comply with the terms of the CC-BY-SA