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