part of part of attaches_to contributes to morphology of mitral valve mitral valve anulus FMA:9498 The fibrous ring of the mitral valve that attaches the cusps of mitral valve to the heart, and which consists of portions of the fibrous scallops of the anterior and posterior cusps UBERON:0005995 anulus of mitral valve fibrous ring of mitral valve mitral annulus mitral anulus mitral valvar anulus uberon mitral valve cusp fibrous ring of heart neural crest-derived structure