attaches_to constitutional_part_of regional_part_of Left atrium Left ventricle Mitral valve Leaflet of mitral valve Wall of left side of heart Left fibrous ring of heart Fibrous skeleton of heart Fibrous ring of heart Fibrous ring of mitral valve Anulus of mitral valve FMA:9498 Mitral anulus Mitral valvar anulus Mitral valve anulus fma left fibrous ring of heart which consists of the anulus proper, the interfilar connective tissue, the left fibrous trigone and the subaortic curtain of left ventricle that attaches the leaflets of mitral valve to the wall of heart.