title: Ultrastructure of the normal mucosa in the human middle ear, mastoid cavities, and eustachian tube.
mesh_terms: D004432:Ear, Middle / Q000166:cytology*; D004847:Epithelial Cells; D005064:Eustachian Tube / Q000166:cytology*; D006801:Humans; D008416:Mastoid / Q000166:cytology*; D008853:Microscopy; D008854:Microscopy, Electron; D009092:Mucous Membrane / Q000166:cytology*