The ovary has a central medulla and an outer cortex. The cortex is covered by germinal epithelium, while the medulla contains stroma with blood vessels, lymph vessels, and nerve fibers.
In the cortex, you find developing ovarian follicles, starting with primordial follicles that have a central primary oocyte. Throughout the menstrual cycle, these primordial follicles mature into various layers, eventually forming Graafian follicles.
The Graafian follicle consists of theca externa, theca interna, and membrana granulosa layers around a space filled with liquor folliculi.
A cumulus oophorus supports the ovum, covered by vitelline membrane, zona pellucida, and corona radiata.
Additionally, the ovarian cortex displays the corpus luteum, formed after ovulation, which turns into corpus albicans if there’s no conception.