Urogenital sinus 416448 149538376 2007-08-06T13:31:05Z Mikael Häggström 2615838 +link to more info {{Infobox Embryology | Name = {{PAGENAME}} | Latin = sinus urogenitalis | GraySubject = 252 | GrayPage = 1213 | Image = Gray1109.png | Caption = [[Urogenital sinus]] of female human [[embryo]] of eight and a half to nine weeks old. (Urogenital sinus labeled at bottom.) | Image2 = Gray1119.png | Caption2 = Stages in the development of the external sexual organs in the male and female. ("Opening of urogenital sinus" labeled in diagram D.) | System = | CarnegieStage = 15 | Days = | Precursor = [[Cloaca (embryology)|Cloaca]] | GivesRiseTo = [[urethra]], [[urinary bladder|bladder]], [[vagina]] | MeshName = | MeshNumber = | DorlandsPre = s_12 | DorlandsSuf = 12739359 | }} The '''urogenital sinus''' (also known as the '''persistent cloaca''') is a part of the human body only present in the [[development of the urinary and reproductive organs]]. It is the ventral part of the cloaca, formed after the [[cloaca]] separates from the [[rectum]]. It eventually becomes, among other things, the [[urinary bladder|bladder]]. ==Pathology== A '''urogenital sinus anomaly''' is also a rare [[birth defect]] in [[women]] where the [[urethra]] and [[vagina]] both open into a common channel. ==Additional images== <gallery> Image:Gray1107.png|Enlarged view from the front of the left Wolffian body before the establishment of the distinction of sex. </gallery> ==External links== * [http://www.urologyhealth.org/pediatric/index.cfm?cat=01&topic=152 Urologyhealth.org page on Urogenital Sinus anomalies] * [http://faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/Bio%20102/Bio%20102%20Laboratory/fetal%20pig/Image3.jpg Fetal pig dissection] {{Development of urinary and reproductive systems}}[[Category:Embryology]]