The membrane that covers the embryonic cloaca, formed by the union of proctodeal (anal pit) ectoderm and cloacal endoderm, with no intervening mesoderm; the urorectal septum joins the cloacal membrane and divides it into an anal membrane and a urogenital membrane; the point where the urorectal septum intersects the cloacal membrane is the future site of the perineal body; proliferation of mesoderm and ectoderm around the cloacal membrane produces primordial tissues of the external genitalia in both sexes: the genital tubercle, genital folds, and genital swellings. [ MP:anna http://en.wikipedia.org/wiki/Cloacal_membrane MP:0011837 ]

This is just here as a test because I lose it

Term information

Subsets

pheno_slim, emapa_ehdaa2

definition

The membrane that covers the embryonic cloaca, formed by the union of proctodeal (anal pit) ectoderm and cloacal endoderm, with no intervening mesoderm; the urorectal septum joins the cloacal membrane and divides it into an anal membrane and a urogenital membrane; the point where the urorectal septum intersects the cloacal membrane is the future site of the perineal body; proliferation of mesoderm and ectoderm around the cloacal membrane produces primordial tissues of the external genitalia in both sexes: the genital tubercle, genital folds, and genital swellings.

depicted by

http://upload.wikimedia.org/wikipedia/commons/d/d2/Gray991.png

external definition

A membrane that separates the proctodeum and the hindgut in the early embryo. [Evolution, Fourth_Edition_(2006)_McGraw-Hill, Function, Vertebrates:_Comparative_Anatomy, p.497, see_Kardong_KV][VHOG]

has exact synonym

embryonic cloacal membrane

has related synonym

membrana cloacalis

homology notes

In mammals, the cloaca exists as an embryonic structure that undergoes septation to become distinct urethral, anal, and genital orifices.[well established][VHOG]

id

UBERON:0006217