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Encyclopedia > Urogenital sinus

The urogenital sinus (also known as the persistent cloaca) is a part of the human body while it is an embryo. It is the ventral part of the cloaca, formed after the cloaca separates from the rectum. It eventually becomes, among other things, the bladder.


A urogenital sinus anomaly is also a rare birth defect in women where the urethra and vagina both open into a common channel.


External links

  • Urologyhealth.org page on Urogenital Sinus anomalies (http://www.urologyhealth.org/pediatric/index.cfm?cat=01&topic=152)

  Results from FactBites:
 
Endotext.com - Pediatric Endocrinology, Sexual Differentiation (5050 words)
The urogenital sinus is individualized in 7-9 mm (~5 week) human embryos, when a transverse urorectal septum divides the cloaca into the rectum dorsally and the primitive urogenital sinus ventrally, closed by the genital membrane which disappears in 20-22 mm (~8 week) embryos (167).
The Müllerian tubercle demarcates the cranial vesicourethral canal from the caudal urogenital sinus.
The urethral plate, an extension of the urogenital sinus which is present within the genital tubercle from the earliest stages of development (172), lies in the roof of the primary urethral groove and extends to the tip of the phallus.
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