oral cavity AAO:0000053 AAO:0000960 Anatomical cavity at the start of the digestive tract that that is enclosed by the mouth. The boundaries and contents vary depending on the species. In vertebrates, the boundaries are the oral opening, the cheeks, the palate and (if present) the palatoglossal arch - if this is not present then the mouth and pharynx form the oropharyngeal cavity. The buccal cavity contains the teeth, tongue and palate (when present) Anatomical cavity bounded anteriorly by the mouth and posteriorly by the derivatives of the branchial arches.[AAO] BSA:0000107 CALOHA:TS-1315 EFO:0001975 EHDAA2:0001324 EHDAA:6970 EMAPA:17411 EMAPA:18399 EV:0100057 Echinoderms, hemichordates, and chordates are called deuterostomes because the mouth arises not from the blastopore but from a second invagination at the anterior end of the larva that pushes in to connect with the archenteron.[well established][VHOG] FMA:20292 HAO:0000669 NCIT:C12421 TAO:0001027 TGMA:0000102 The cavity of the mouth, bounded by the jaw bones and associated structures (muscles and mucosa). [TFD][VHOG] UBERON:0000167 UMLS:C0226896 VHOG:0000188 WBbt:0005255 XAO:0000126 ZFA:0001027 bucca buccal cavity cavity of mouth uberon anatomical entity