Heart and great vessels of the 30-mm embryo.
Keywords: apex of heart, arch of aorta, ascending aorta, atrioventricular sulcus, brachiocephalic artery, ductus arteriosus, inferior vena cava, interventricular sulcus, left atrium, left common carotid artery, left ventricle, right atrium, right brachiocephalic vein, right common carotid artery, right subclavian artery, right ventricle, right vertebral artery, superior vena cava
Source: Atlas of Human Embryos.