mucosa mouth mucosa A mucous membrane that lines the mouth. BTO:0002860 CALOHA:TS-0716 EMAPA:26937 FMA:59660 GAID:951 MA:0002794 MESH:A10.615.550.599 UBERON:0003729 UMLS:C0026639 buccal mucosa mouth mucosa mouth mucous membrane mouth organ mucosa mucosa of mouth mucosal lining of mouth mucous membrane of mouth oral mucosa oral mucous membrane oral part of viscerocranial mucosa the mucous membrane epithelium of the mouth. It can be divided into three categories: masticatory, lining, and specialized[Wikipedia:Oral_mucosa]. this is defined as any mucous membrane of the mouth - including palate, lips, uvula, etc. ncit split mouth/oral mucosa into lip and buccal. In future we may split into masticatory/keratinized (gingiva + hard palate) vs lining/non-keratinized (lips, cheeks, floor of mouth, soft palate). FMA distinguishes between mucosa of mouth and region of mouth (the latter including the buccal mucosa) tunica mucosa oris tunica mucosa oris uberon ectoderm-derived structure