heart ventricle papillary muscle morphology trait VT:0000063 Trait.ontology Any measurable or observable characteristic related to the shape, structure, color or pattern of the group of myocardial bundles which terminate in the chordae tendineae that attach to the cusps of the atrioventricular valves; each ventricle has an anterior and a posterior papillary muscle; the right ventricle sometimes has a septal papillary muscle. musculus papillaris morphology trait ventricular papillary muscle morphology trait MP:0004058 heart ventricle morphology trait heart muscle morphology trait