The larger ovarian follicles consist of an external fibrovascular coat, connected with the surrounding stroma of the ovary by a network of blood vessels, and an internal coat, which consists of several layers of nucleated cells, called the membrana granulosa. It contains numerous granulosa cells.

At one part of the mature follicle the cells of the membrana granulosa are collected into a mass which projects into the cavity of the follicle. This is termed the discus proligerus.

This article incorporates text in the public domain from page 1256 of the 20th edition of Gray's Anatomy (1918)

• Histology image: 18404loa – Histology Learning System at Boston University - "Female Reproductive System: ovary, cumulus oophorus"
• Histology image: 14808loa – Histology Learning System at Boston University - "Female Reproductive System: ovary, membrana granulosa"
• Histology image: 83_15 at the University of Oklahoma Health Sciences Center
• Description at okstate.edu

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