part of part of epithelium tympanic membrane tympanic membrane epithelium tympanic epithelium One of the two epithelia which make up the tympanic membrane (along with the fibrous layer). NCIT:C49308 UBERON:0009647 tympanic membrane epithelial layer EMAPA:19064 MA:0001224 SCTID:70839004 intermediate layer of tympanic membrane layer of tympanic membrane middle ear epithelium