Female Reproductive System 2010 revise

Female Reproductive System 2010 revise - Female...

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Female Reproductive System 2009 I. The female reproductive tract begins with the ovaries . The surface of the ovary is covered by a cuboidal to columnar epithelium (so this differs from the mesothelium and serosa of the peritoneum but it is continuous with the mesothelium). From this point on, there is a lot of strange terminology, mostly in Latin, so be patient and take it step by step as I will translate everything for you. Under the cuboidal epithelium is a layer of dense CT called the tunica albuginea (white covering, easily seen in a fresh specimen). The bulk of the ovary consists of stroma which is a type of CT in which the stromal cells predominate over inconspicuous fibers (so, it is more cellular that regular dense CT). Ovarian follicles are interspersed in the stroma of the cortex. The stroma is highly vascularized. The outer part of the ovary is the cortex. The cortex contains all of the ovarian follicles. The most internal part of the ovary is the medulla containing the larger blood vessels. The following pictures taken from: www.histol.chuvashia.com OVARY Stained with haematoxylin and eosin general view 1 - cortex 2 - medulla 3 - area where primordial follicles are located 4 - primordial follicles 5 - secondary follicles 6 - tertiary follicles 7 - mature follicles (Graafian follicles) 8 - atretic follicles cortex cortex
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1 - secondary follicle 2 - follicular (granulosa) cells 3 - oocyte 4 - zona pellucida 5 - primordial follicle 6 - simple cuboidal epithelium which covers the ovary 7 - tunica albuginea 8 - interstitial connective tissue 9 - theca cortex primary follicle cortex secondary follicle 1 - primary follicle 2 - follicular (granulosa) cells 3 - oocyte 4 - zona pellucida 5 - primordial follicle 8 - interstitial connective tissue 9 - theca 1 - secondary follicle 2 - follicular (granulosa) cells 3 - oocyte 4 - zona pellucida 5 - secondary follicles 8 - interstitial connective tissue 9 - theca cortex cortex
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primordial follicles atretic follicle 5 - primordial follicles 6 - simple cuboidal epithelium 7 - tunica albuginea 8 - interstitial connective tissue 2 - follicular cells with reduced volume of the cytoplasm 3 - wrinkled oocyte 4 - zona pellucida cortex corpus luteum cortex corpus luteum 1 - parenchyma of the corpus luteum 2 - connective tissue capsule 5 - luteocytes 6 - interstitial connective tissue Growth of ovarian follicles (folliculogenesis) – what happens ?
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Ovarian follicles: During embryogenesis about 7 million primary oocytes are formed but many are lost through a degenerative process called atresia (apoptosis). The process of atresia takes place from before birth until after menopause. At puberty, the ovaries contain about 300,000 oocytes. At any given time, most of the ovarian follicles are in a resting state. These are the primordial follicles; they consist of a primary oocyte surrounded by a single layer of flattened (squamous) follicular or granulosa cells . These are the only kind of follicle present at birth in a female. About 2 to 4 million primordial follicles are present at time of birth.
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Female Reproductive System 2010 revise - Female...

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