The medulla of ovary is a highly vascular stroma in the center of the ovary

Ovary

The ovary is an ovum-producing reproductive organ, often found in pairs as part of the vertebrate female reproductive system. Ovaries in anatomically female individuals are analogous to testes in anatomically male individuals, in that they are both gonads and endocrine glands.-Human anatomy:Ovaries...

. It forms from embryonic mesenchyme and contains blood vessels, lymphatic vessels, and nerves.

This stroma forms the tissue of the hilum

Hilum (anatomy)

In human anatomy, the hilum is a depression or fissure where structures such as blood vessels and nerves enter an organ.-Examples of hila:* Hilum of kidney, admits the renal artery, vein, ureter, and nerves...

 by which the ovarian ligament

Ovarian ligament

The ovarian ligament is a fibrous ligament that connects the ovary to the lateral surface of the uterus....

 is attached, and through which the blood vessels enter: it does not contain any ovarian follicle

Ovarian follicle

Ovarian follicles are the basic units of female reproductive biology, each of which is composed of roughly spherical aggregations of cells found in the ovary. They contain a single oocyte . These structures are periodically initiated to grow and develop, culminating in ovulation of usually a single...

s.

External links

- "Female Reproductive System: ovary, medulla and cortex"