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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:posterior nasal aperture
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Accession:UBERON:0004771 term browser browse the term
Definition:Opening/conduit between the nasal cavity and the nasopharynx[AAO] The choanae are separated by the vomer[WP].
Comment:[homology-note] "The choana, a unique 'internal nostril' opening from the nasal sac into the roof of the mouth, is a key part of the tetrapod (land vertebrate) respiratory system. It was the first component of the tetrapod body plan to evolve, well before the origin of limbs, and is therefore crucial to our understanding of the beginning of the fish-tetrapod transition. (...) Here we present new material of Kenichthys, a 395-million-year-old fossil fish from China, that provides direct evidence for the origin of the choana and establishes its homology: it is indeed a displaced posterior external nostril that, during a brief transitional stage illustrated by Kenichthys, separated the maxilla from the premaxilla.[well established][VHOG]" xsd:string {date_retrieved="2012-09-17", external_class="VHOG:0000545", ontology="VHOG", source="DOI:10.1038/nature02843 Zhu M, Ahlberg PE, The origin of the internal nostril in tetrapodes. Nature (2004)", source="http://bgee.unil.ch/"}; [taxon-note] "Fish don't have choanae, instead they have two pairs of external nostrils" xsd:string {source="WP"}; [taxon-note] "In addition to tetrapods, the lungfish has internal nostrils too. In tetrapods the exhalant nostril (choana) empties into the buccal cavity."
Synonyms:exact_synonym: posterior nasal apperture
 broad_synonym: choana;   internal naris
 related_synonym: choanae;   nasopharyngeal naris;   posterior choana;   posterior naris
 xref: AAO:0000093;   EHDAA2:0000242;   EHDAA:7842;   EMAPA:17849;   FMA:53143;   MA:0001323;   SCTID:244507001;   VHOG:0000545;   Wikipedia:Posterior_nasal_apertures;   XAO:0000277


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Term paths to the root
Path 1
Term Annotations click to browse term
  UBERON ontology 0
    anatomical entity 0
      material anatomical entity 0
        anatomical structure 0
          multicellular anatomical structure 0
            organ system subdivision 0
              subdivision of skeletal system 0
                cranium 0
                  posterior nasal aperture 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
                entire sense organ system 0
                  sensory system 0
                    chemosensory system 0
                      olfactory system 0
                        naris 0
                          internal naris 0
                            posterior nasal aperture 0
paths to the root