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Urorectal septum

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Urorectal septum

Urorectal septum
Cloaca of human embryo from twenty-five to twenty-seven days old.
Latin septum urorectale
Gray's subject #241 1109
Days 32
Code TE E5.4.9.0.2.0.14

The entodermal cloaca is divided into a dorsal and a ventral part by means of a partition, the urorectal septum, which grows downward from the ridge separating the allantois from the cloacal opening of the intestine and ultimately fuses with the cloacal membrane and divides it into an anal and a urogenital part. The dorsal part of the cloaca forms the rectum, and the anterior part of the urogenital sinus and bladder.

Clinical significance

Malformation of the urorectal septum can lead to several different types of fistulas.[1]

References

External links

  • http://cancerweb.ncl.ac.uk/cgi-bin/omd?urorectal+septum
  • http://www.embryology.ch/anglais/turinary/urinbasse01.html
  • http://isc.temple.edu/marino/embryology/parch98/parch_text.htm
  • http://www.med.mun.ca/anatomyts/renal/akid5.htm
  • http://www.med.umich.edu/lrc/coursepages/M1/embryology/embryo/10digestivesystem.htm

This article incorporates text from a public domain edition of Gray's Anatomy.


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