Preferred Label : primitive urogenital sinus;
Uberon definition : the ventral part of the cloaca remaining after septation of the rectum, which further
develops into part of the bladder, part of the prostatic part of the male urethra
and the urethra and vestibule in females;
Uberon synonym : UGS; fetal UGS;
Uberon broad term : urogenital sinus;
Uberon Homology note : In mammals the lowly monotremes still have a cloaca. Higher types have done away with
this structure and have a separate anal outlet for the rectum. The monotreme cloaca
shows the initiation of this subdivision. The cloaca has such includes only the distal
part, roughly comparable to the proctodeum. The more proximal part is divided into
(1) a large dorsal passage into which the intestine opens, the coprodeum, and (2)
a ventral portion, the urodeum with which the bladder connects. (...) the development
of the placental mammals recapitulates in many respects the phylogenetic story. In
the sexually indifferent stage of placental mammal there is a cloaca. While the indifferent
stage still persists, a septum develops, and extends out to the closing membrane.
This divides the cloaca into two chambers: a coprodeum continuous with the gut above,
and a urodeum or urogenital sinus below.[well established][VHOG];
Uberon Terminology note : the term 'urogenital sinus' may refer to the primitive urogenital sinus present as
a transient developmental structure in most mammals or it may refer to a condition
in which an unseptated cloaca persists in animals longer than normal;
Origin ID : 0000164;
UMLS CUI : C0231057;
Automatic exact mappings (from CISMeF team)
- Semantic type(s)
- UMLS correspondences (same concept)
- Uberon cross reference
- contributes to morphology of
- develops from
- develops into
- has part
- part of
- surrounded by
the ventral part of the cloaca remaining after septation of the rectum, which further
develops into part of the bladder, part of the prostatic part of the male urethra
and the urethra and vestibule in females
