part of part of located in located in develops from develops from organ internal ear membranous labyrinth http://upload.wikimedia.org/wikipedia/commons/8/8c/Gray924.png UBERON:0010113 UMLS:C0458700 AAO:0011060 XAO:0000194 labyrinthus membranaceus Wikipedia:Membranous_labyrinth NCIT:C33090 SCTID:263790009 inner ear has parts membranous and osseuous/bony labyrinth. it's not clear where the EMAPA term 'labyrinth' belong, we place them here for now A system of communicating epithelial sacs and ducts within the bony labyrinth, containing the endolymph. [TFD][VHOG] Organ with organ cavity which consists of the vestibular labyrinth and the cochlear labyrinth. The membranous labyrinth is lodged within the bony labyrinth and has the same general form; it is, however, considerably smaller and is partly separated from the bony walls by a quantity of fluid, the perilymph.[FMA, WP]. EHDAA:4698 EV:0100367 MA:0000242 FMA:61022 EHDAA2:0000899 UBERON:0001849 VHOG:0000729 The labyrinth, or inner ear, evolved very early in vertebrate history and, with many variations in configuration but none of basic design and function, has been retained by all vertebrates.[well established][VHOG] ear vesicle otic capsule