File:Ovary histology 061c.jpg

From Embryology

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Ovary - Secondary Follicle

  • Small fluid-filled spaces become visible between the granulosa cells as the follicle reaches a diameter of about 400 µm.
  • These spaces enlarge and fuse to form the follicular antrum, which is the defining feature of the secondary follicle.
  • The oocyte is now located eccentric in the follicle in the cumulus oophorus, where it is surrounded by granulosa cells.
  • The theca folliculi differentiates with the continued growth of the follicle into a theca interna and a theca externa.
  • Vascularization of the theca interna improves, and the spindle-shaped or polyhedral cells in this layer start to produce oestrogens.
  • The theca externa retains the characteristics of a highly cellular connective tissue with smooth muscle cells.
  • The oocyte of the secondary follicle reaches a diameter of about 125 µm.
  • The follicle itself reaches a diameter of about 10-15 mm.


Links: Image-Secondary Follicle ullabeled | Image-Secondary Follicle labeled | Ovary Development | Oocyte Development
Image Links: large 1000px | medium 800px | small 400px


File:Ovary_histology_006.jpg

Ovary, monkey H&E reproductive system, female, secondary follicle, cumulus oophorus, zona_pelucida,_granulosa_cells,_oocyte x20

Ovary histology: Tunica Albuginea x20 | Tunica albuginea, Germinal epithelium x40 | Primary follicle, primordial follicle, oocyte, x40 | Secondary follicle, cumulus oophorus, zona pelucida, granulosa cells, oocyte x20 | Corpus luteum, theca lutein cells, granulosa lutein cells, Loupe | Corpus luteum, theca lutein cells, granulosa lutein cells, x10 | Corpus luteum, theca lutein cells, granulosa lutein cells, x40 | Corpus albicans, primary follicle, primordial follicle, granulosa cells, oocyte x20 | Menstrual Cycle | Ovary Development



Links: Histology | Histology Stains | Blue Histology images copyright Lutz Slomianka 1998-2009. The literary and artistic works on the original Blue Histology website may be reproduced, adapted, published and distributed for non-commercial purposes. See also the page Histology Stains.


Cite this page: Hill, M.A. (2024, April 21) Embryology Ovary histology 061c.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Ovary_histology_061c.jpg

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G

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current21:48, 5 May 2011Thumbnail for version as of 21:48, 5 May 2011400 × 320 (56 KB)S8600021 (talk | contribs)==Ovary - Secondary Follicle== * Small fluid-filled spaces become visible between the granulosa cells as the follicle reaches a diameter of about 400 µm. * These spaces enlarge and fuse to form the follicular antrum, which is the defining feature of th

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