valves of the heart anatomy medical

presentation cartoon diagram drawing circle organ mouth brand nose face head line text hand font eye arm ear left atrium pulmonary veins right superior vena cava inferior posterior interventricular sulcus coronary sinus arteries apex heart artery circumflex great cardiac vein middle ventricle interatrial septum base anterior surface diaphragmatic aorta tricuspid valve mitral aortic sinoatrial node atrioventricular bundle bundle purkinje fibers heart layers function epicardium myocardium endocardium