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CROSS-SPECIES ANATOMY - ANNOTATIONS

The Basic subset of the UBERON integrated, cross-species anatomy ontology is downloaded weekly from http://berkeleybop.org/ontologies/uberon/basic.obo. For more information about this ontology see the "About" page on the UBERON website at http://uberon.github.io/about.html.

Term:urorectal septum
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Accession:UBERON:0005760 term browser browse the term
Definition:The ridge of mesoderm covered with endoderm that in the early developing embryo partitions the endodermal cloaca into the primary urogenital sinus (ventrally) and the anorectal canal of the hindgut (dorsally); the urorectal septum eventually fuses with the cloacal membrane, dividing it into a dorsal anal membrane and a larger ventral urogenital membrane - this area of fusion is represented in the adult by the perineal body[MP].
Comment:[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]" xsd:string {date_retrieved="2012-09-17", external_class="VHOG:0000018", ontology="VHOG", source="ISBN:978-0721676678 Romer AS, Vertebrate body (1970) p.388-89 and Figure 300", source="http://bgee.unil.ch/"}
Synonyms:exact_synonym: septum urorectale;   urorectal fold;   urorectal membrane
 related_synonym: cloacal septum
 xref: EHDAA2:0002152;   EHDAA:5921;   EMAPA:17212;   MA:0003235;   NCI:C34323;   UMLS:C1519838;   VHOG:0000018;   Wikipedia:Urorectal_septum


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Path 1
Term Annotations click to browse term
  UBERON ontology 0
    anatomical entity 0
      material anatomical entity 0
        anatomical structure 0
          septum 0
            urorectal septum 0
              fundus of urinary bladder + 0
Path 2
Term Annotations click to browse term
  UBERON ontology 0
    anatomical entity 0
      material anatomical entity 0
        anatomical structure 0
          multicellular anatomical structure 0
            multicellular organism 0
              anatomical system 0
                excretory system 0
                  renal system 0
                    urorectal septum 0
                      fundus of urinary bladder + 0
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