Relier Pairs Heart EmbryologyVersion en ligne Match the structure with what it gives rise to par Jimmy Jennings 1 bulbus cordis 2 right common cardinal vein and right anterior cardinal vein 3 left horn of sinus venosus 4 primitive pulmonary vein 5 endocardial cushion 6 truncus arteriosus 7 primitive ventricle 8 right horn of sinus venosus 9 primitive atrium atrial septum, membranous interventricular septum smooth left atrium coronary sinus smooth parts of lv and rv atrioventricular node, semilunar valves, trabeculated part of LA and RA superior vena cava smooth part of right atrium ascending aorta/pulmonary trunk trabeculated LV and RV