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The Basic subset of the UBERON integrated, cross-species anatomy ontology is downloaded weekly from For more information about this ontology see the "About" page on the UBERON website at

Term:non-material anatomical boundary
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Accession:UBERON:0000015 term browser browse the term
Definition:A non-material anatomical entity of two dimensions. Anatomical boundaries are contiguous structures.
Comment:Except in the case of abstracted fiat boundaries such as the midline plane of an organism, all 2D anatomical entities have a 3 dimensional projection. For example, the surface of the shell of a muscle has a distinct shape that projects into the third dimension. Note that boundaries are 2D structures. They have no thickness - and so can not be sites of gene expression or gene product localisation. For this, use boundary region terms.
Synonyms:exact_synonym: anatomical boundary
 xref: AEO:0000192;   CARO:0000010;   FMA:50705
 external_ontology: present_in_taxon NCBITaxon:33090;   present_in_taxon NCBITaxon:33208;   present_in_taxon NCBITaxon:4751

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Term paths to the root
Path 1
Term Annotations click to browse term
  UBERON ontology 0
    anatomical entity 0
      immaterial anatomical entity 0
        non-material anatomical boundary 0
          anatomical line + 0
          embryonic-extraembryonic boundary 0
          iridocorneal angle 0
          tooth apex + 0
paths to the root