The image shows part of a section of the ovary. Follicles consisting of an oocyte surrounded by layers of follicle cells develop in the cortex of the ovary. The arrow bar shows the diameter of one mature or Graafian follicle. Many smaller follicles are in the space between the mature follicles and the outer edge of the ovary, but they just look like pink spots in this image. Mature human follicles are almost an inch about 2.
An ovarian follicle is a roughly spheroid cellular aggregation set found in the ovaries. It secretes hormones that influence stages of the menstrual cycle. Women begin puberty with about , follicles,  each with the potential to release an egg cell ovum at ovulation for fertilization. Ovarian follicles are the basic units of female reproductive biology. Each of them contains a single oocyte immature ovum or egg cell. These structures are periodically initiated to grow and develop, culminating in ovulation of usually a single competent oocyte in humans.
CD markers is now part of the Stains chapter ; new Molecular markers chapter. Page views in 15, Cite this page: Ghofrani M. Accessed May 28th,
Note : There are 3 sections of ovary on this slide. Examine with the scanning objective, and note the general division of the ovary into an outer cortex containing follicles in various stages of development and an inner medulla containing numerous blood vessels and dense fibrous connective tissue. With the naked eye, one can easily distinguish the follicles. Under the microscope, note the scarcity of primary follicles, suggesting that this ovary is from an older woman. Many larger follicles are in various stages of atresia.