Cloacal membrane
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| Cloacal membrane | |
|---|---|
 | |
| Tail end of human embryo from fifteen to eighteen days old. | |
| Latin | membrana cloacalis |
| Gray's | p.47 |
| Carnegie stage | 7 |
| Days | 15 |
| Precursor | caudal end of the primitive streak |
| Code | TE E5.4.0.0.0.0.15 |
The cloacal membrane is the membrane that covers the embryonic cloaca when still in the development of the urinary and reproductive organs.
It is formed by ectoderm and endoderm coming into contact with each other.[1] After separation of the cloaca into the urogenital and anal parts, the cloacal membrane, in turn, is separated into a urogenital membrane and an anal membrane.
It has been suggested that developmental errors may be associated with enlarged clitorises.[2]
References
- ↑ "Endoderm -- Developmental Biology -- NCBI Bookshelf".
- ↑ van der Putte SC (November 2009). "Penislike clitorises with megalourethras in nonvirilized female fetuses and a newborn. A histopathologic study and its bearing on their pathogenesis". J. Pediatr. Surg. 44 (11): 2223–9. doi:10.1016/j.jpedsurg.2009.07.024. PMID 19944238.
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
This article incorporates text from a public domain edition of Gray's Anatomy.
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