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Urogenital sinus

Urogenital sinus
Urogenital sinus of female human embryo of eight and a half to nine weeks old. (Urogenital sinus labeled at bottom.)
Stages in the development of the external sexual organs in the male and female. ("Opening of urogenital sinus" labeled in diagram D.)
Latin sinus urogenitalis
Gray's subject #252 1213
Carnegie stage 15
Precursor Cloaca
Gives rise to urethra, bladder, vagina
Dorlands/Elsevier s_12/12739359

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 bladder.


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

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Urogenital_sinus". A list of authors is available in Wikipedia.
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