Cloacal membrane
| Cloacal membrane | |
|---|---|
| File:Gray991.png
Tail end of human embryo from fifteen to eighteen days old.
|
|
| Details | |
| Latin | membrana cloacalis |
| Carnegie stage | 7 |
| Days | 15 |
| Precursor | caudal end of the primitive streak |
| Identifiers | |
| Code | TE E5.4.0.0.0.0.15 |
| TA | Lua error in Module:Wikidata at line 744: attempt to index field 'wikibase' (a nil value). |
| TH | {{#property:P1694}} |
| TE | {{#property:P1693}} |
| FMA | {{#property:P1402}} |
| Anatomical terminology
[[[d:Lua error in Module:Wikidata at line 863: attempt to index field 'wikibase' (a nil value).|edit on Wikidata]]]
|
|
The cloacal membrane is the membrane that covers the embryonic cloaca during the development of the urinary and reproductive organs.
It is formed by ectoderm and endoderm coming into contact with each other.[1] As the human embryo grows and caudal folding continues, the urorectal septum divides the cloaca into a ventral urogenital sinus and dorsal anorectal canal. Before the urorectal septum has an opportunity to fuse with the cloacal membrane, the membrane ruptures, exposing the urogenital sinus and dorsal anorectal canal to the exterior. Later on, an ectodermal plug, the anal membrane, forms to create the lower third of the rectum.
References
This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
- Swiss embryology (from UL, UB, and UF) hdisqueembry/triderm04
- genital-021—Embryo Images at University of North Carolina
- Diagram at unsw.edu.au
- Overview at ana.ed.ac.uk
<templatestyles src="Asbox/styles.css"></templatestyles>
 |
This developmental biology article is a stub. You can help Wikipedia by expanding it. |
