Pulmonary trunk Anterior semilunar cusp Left semilunar cusp Pulmonary Right semilunar cusp Aortic valve valve Right semilunar cusp Left semilunar cusp Posterior semilunar cusp Anterior interventricular branch Anterior cardiac branch.right coronary artery Left coronary artery Circumflex branch Right coronary artery left coronary artery Left fibrous trigone- Right fibrous ring Great cardiac vein Left fibrous ring Right fibrous trigone Coronary sinus (deep to muscle】 Atrioventricular valves Tricuspid(right) Small cardiac vein Anterior cusp 2 Posterior cusp Atrioventricular bundle Valve and orifice of coronary sinus 3 Septal cusp Posterior interventricular branch,right coronary artery Bicuspid (left) 1 Anterior cusp Middle cardiac vein 2 Posterior cusp (Superior View) Second Clinical Medical College of Southern Medical University Second Clinical Medical College of Southern Medical University (Superior View)