adjacent to anatomical structure surface structure consider obsoleting. See issue/1305 AAO:0010337 galen:SurfaceRegion Wikipedia:Surface_structure ZFA:0000292 surface region Anatomical structure that overlaps the outer epithelial layer and is adjacent to the space surrounding the organism. EHDAA2_RETIRED:0003010 VSAO:0000001 UBERON:0003102 surface structures AEO_RETIRED:0000010 surface feature XAO:0003028 anatomical surface feature TAO:0000292 surface structure space surrounding organism