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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:polar trophectoderm
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Accession:UBERON:0006280 term browser browse the term
Definition:Trophectoderm that surrounds the inner cell mass (ICM).
Comment:[development-note] "unlike mural trophectoderm cells which stop proliferating and become large polyploid cells (the primary trophoblastic giant cells) by endoreduplication, polar trophectoderm cells remain diploid, continue to proliferate and give rise to both the ectoplacental cone and the extraembryonic ectoderm[MP]"; [homology-note] "(...) the trophoblast develops rapidly so that contact may be made with the maternal uterine tissues when conditions are appropriate. We have here an excellent example of an embryonic adaptation, the development of a structure never present in either adult or embryo of 'lower' vertebrates.[well established][VHOG]" xsd:string {date_retrieved="2012-09-17", external_class="VHOG:0000980", ontology="VHOG", source="ISBN:978-0721676685 Romer AS, Parsons TS, Vertebrate body (1977) p.105-106", source="http://bgee.unil.ch/"}
Synonyms:related_synonym: polar trophoblast
 xref: EHDAA2:0001484;   EHDAA:60;   EMAPA:16048;   VHOG:0000980



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Path 1
Term Annotations click to browse term
  UBERON ontology 0
    anatomical entity 0
      material anatomical entity 0
        developing anatomical structure 0
          extraembryonic structure 0
            polar trophectoderm 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
                organ 0
                  organ part 0
                    anatomical wall 0
                      organ component layer 0
                        membranous layer 0
                          extraembryonic membrane 0
                            trophectoderm 0
                              polar trophectoderm 0
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