内耳 骨迷 Inner ear 路 endolymph . superor semicircular canal boni perilymph labyrinth superior horizontal semicircular duct membranous semicircular labyrinth canal vestibule horizontal cochlea semicircular duct 膜迷 posterior semicircular 路 canal ampullae posterior semicircular duct round window oval window cochlear duct @1997 Encyclopaedia Brit annica, Inc内耳inner ear 骨迷 路 膜迷 路