has part has part has_part characteristic of part of has modifier abnormal semicircular canal morphology abnormal semicircular canal ampulla morphology MPheno.ontology MP:0008488 any structural anomaly of the spherical enlargement at the base of each semicircular canal where they connect with the utricle, containing the crista ampullaris which detects movement of the fluid within the canals abnormal membranous ampullae of the semicircular ducts morphology abnormal semicircular canal ampulla