part of part of has part has part connects connects develops from develops from attached to attached to system cardiac valve endocardial cushion cardiac atrium cardiac ventricle atrioventricular valve AV valve FMA:7233 EHDAA:7421 MA:0002789 SCTID:11124005 galen:AtrioventricularValve in ZFA this is part of both atrium and ventricle, but we use a connecting relationship here; see also notes for left and right. A cardial valve in the atrioventricular region that separates the atrium from the ventricle and prevent backflow from the ventricles into the atria during systole. Valve in the heart through which blood flows from the atria to the ventricles. [TFD][VHOG] atrio-ventricular valve The conus arteriosus is the most distal part of the primitive fish heart and forms the connection between the ventricle and the ventral aorta. At the sinoatrial, the atrioventricular, and the ventriculoconal junctions, valves developed to prevent backflow of blood during relaxation of the preceding compartment.[uncertain][VHOG] EMAPA:35154 EHDAA2:0000153 The atrioventricular valve has four distinct leaflets oriented anterior, posterior, left, and right of the atrioventricular orifice. Hu et al. 2001.[TAO] TAO:0005064 VHOG:0001472 ZFA:0005064 UBERON:0002133 Wikipedia:Heart_valve#Atrioventricular_valves cardiac skeleton chorda tendineae atrioventricular region