Urorectal septum

The endodermal 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. The urorectal septum eventually becomes part of the perineal body.

Urorectal septum
Cloaca of human embryo from twenty-five to twenty-seven days old.
Details
Days32
Identifiers
Latinseptum urorectale
TEE5.4.9.0.2.0.14
Anatomical terminology

Clinical significance

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

gollark: Because of that updates are nonexistent after a year or so, and updating means a full reboot and stuff.
gollark: You have to download something like 40GB of stuff to build an Android system image because of course it's all one giant monolithic image.
gollark: Their OSes are kind of bloated because Android is stupid.
gollark: I did really quite like the aesthetic of the actual Nokia Lumia hardware they had, but... Windows.
gollark: The only person I've seen with one is a more Microsoft-liking friend.

References

This article incorporates text in the public domain from page 1109 of the 20th edition of Gray's Anatomy (1918)

  1. Escobar LF, Heiman M, Zimmer D, Careskey H (2007). "Urorectal septum malformation sequence: Prenatal progression, clinical report, and embryology review". Am. J. Med. Genet. A. 143 (22): 2722–6. doi:10.1002/ajmg.a.31925. PMID 17937427.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.