Each ovary has a medulla and a cortex, and is covered over by a layer of epithelial cells called the germinal epithelium
The medulla is characterised by the presence of numerous blood vessels which branch and are distributed through the cortex
The cortex consist of a connective tissue stroma within which are located the ovarian follicles
The germinal epithelium is a simple cuboidal epithelium
At the mesovarium, where the ovary is attached to the broad ligament, the germinal epithelium is continuous with the peritoneum
The germinal epithelium is so called because it was once thought to be the source of the ova
This is now known not to be the case but the name has stuck
When a mature ovarian follicle ruptures to releases its ovum, the germinal epithelium is breached so that the ovum (theoretically) is deposited into the peritoneal cavity