{{infobox anatomy | name | Ovary | Latin ovarium | GraySubject 266 | GrayPage 1254 | Image Gray589.png | Caption Blood supply of the human female reproductive organs. The left ovary is visible above the label "ovarian arteries". | Image2 | Caption2 | System | Artery ovarian artery, uterine artery | Vein ovarian vein | Nerve ovarian plexus | Lymph Paraaortic lymph node | MeshName Ovary | MeshNumber A05.360.319.114.630 | Dorlands six/000076849 | DorlandsID Ovary }} |
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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.
The ovaries aren't attached to the fallopian tubes but to the outer layer of the uterus via the ovarian ligaments. Usually each ovary takes turns releasing eggs every month; however, if there was a case where one ovary was absent or dysfunctional then the other ovary would continue providing eggs to be released.
Many of the features found in human ovaries are common to all vertebrates, including the presence of follicular cells, tunica albuginea, and so on. However, many species produce a far greater number of eggs during their lifetime than do humans, so that, in fish and amphibians, there may be hundreds, or even millions of fertile eggs present in the ovary at any given time. In these species, fresh eggs may be developing from the germinal epithelium throughout life. Corpora lutea are found only in mammals, and in some elasmobranch fish; in other species, the remnants of the follicle are quickly resorbed by the ovary. In birds, reptiles, and monotremes, the egg is relatively large, filling the follicle, and distorting the shape of the ovary at maturity.
Amphibians and reptiles have no ovarian medulla; the central part of the ovary is a hollow, lymph-filled space. The ovary of teleosts is also often hollow, but in this case, the eggs are shed into the cavity, which opens into the oviduct.
Although most normal female vertebrates have two ovaries, this is not the case in all species. In birds and platypuses, the right ovary never matures, so that only the left is functional. In some elasmobranchs, the reverse is true, with only the right ovary fully developing. In the primitive jawless fish, and some teleosts, there is only one ovary, formed by the fusion of the paired organs in the embryo.
Category:Organs Category:Endocrine system Category:Female reproductive system Category:Pelvis
ar:مبيض bn:ডিম্বাশয় bs:Jajnici br:Vigell bg:Яйчник ca:Ovari cs:Vaječník cy:Ofari da:Æggestok de:Eierstock dv:ބިސްރަވަ el:Ωοθήκη es:Ovario eo:Ovario eu:Obulutegi fa:تخمدان fr:Ovaire (anatomie) ga:Ubhagán gl:Ovario ko:난소 hi:डिम्बग्रंथि hr:Jajnik io:Ovario id:Ovarium is:Eggjastokkur it:Ovaia he:שחלה jv:Ovarium kk:Аналық без ht:Ovè (plant) ku:Organên cinsî yên jinan la:Ovarium lv:Olnīca lt:Kiaušidė mk:Јајчник ml:അണ്ഡാശയം nl:Eierstok ne:डिम्बाशय ja:卵巣 nap:Spogna no:Eggstokk nn:Eggstokk nov:Ovarie pl:Jajniki pt:Ovário ro:Ovar (anatomie umană) qu:Runtuchana ru:Яичники scn:Ovariu simple:Ovary sk:Vaječník sl:Jajčnik sr:Јајници sh:Jajnici fi:Munasarja sv:Äggstock tl:Bahay-itlog ta:சூலகம் te:అండాశయము th:รังไข่ ti:ማሕደረ-እንቛቑሖ tr:Yumurtalık uk:Яєчник zh:卵巢This text is licensed under the Creative Commons CC-BY-SA License. This text was originally published on Wikipedia and was developed by the Wikipedia community.
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