showing a diagram of the ovary. In most species, the ovaries are composed of an outer cortexย and inner medullaย (except in the mare where the cortical region is interior to the medulla). The cortexย is composed ofย ovarian follicles(developing oocytes with their associated follicular cells),ย interstitial gland cellsย andย stromal elements.ย Ovarian follicles are in different stages of development (least mature to most mature): primordial, primary, secondary, secondary-vesicular and mature.ย 1.ย The function of the ovary is to secrete: ova and female hormonesย female hormones onlyย ova only 2. The cortex of the ovary is composed of : the medulla and the hilus loose areolar connective tissue, blood vessels, nerves and lymphatics ovarian follicles, interstitial cells and stromal elements 3.ย These types of follicles may arise at any stage in the development of follicles and represent a dead or degenerating follicle: vesicular follicle atretic follicle luteal follicle.
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