part of part of tube semicircular canal semicircular duct membranous semicircular canal VHOG:0000238 NCIT:C33528 Any of the three loop-shaped membranous inner tubular parts of the semicircular canals that are about one-fourth the diameter of the corresponding outer bony canals, that communicate at each end with the utricle, and that have near one end an expanded ampulla containing an area of sensory epithelium. SCTID:279833009 FMA:61122 MA:0000251 UBERON:0001856 EMAPA:32830 vestibular labyrinth