External anatomy Superior vena cava Ascending aorta Right atrium Right coronary artery Right ventricle Apex Left ventricle Coronary vein Left coronary artery Left atrium Pulmonary trunk Ligamentum arteriosum Arch of aorta

Internal anatomy Superior vena cava Ascending aorta Right atrium Wall of the right atrium Right coronary artery Aortic semilunar valve Cusp of right AV (tricuspid) valve Chordae tendineae Papillary muscle Wall of right ventricle Trabeculae carneae Cusp of left AV (Bicuspid/Mitral) valve Interventricular septum Wall of left ventricle Left ventricle Pulmonary veins Left atrium Wall of left atrium Pulmonary trunk Ligamentum arteriosum Arch of aorta

Right atrium Superior vena cava Sinoatrial (SA) node Fossa ovalis Opening of the coronary sinus Atrioventricular (AV) node Wall of the right atrium Inferior vena cava Cusp of right AV/tricuspid valve Chordae tendineae Papillary muscle Right ventricle Right and left bundle branches Bundle of HIS Aortic semilunar valve Coronary arteries Ascending aorta

Left atrium Superior vena cava Right atrium Ascending aorta Coronary arteries Aortic semilunar valve Chordae tendineae Cusp of left AV (bicuspid/mitral) valve Pulmonary veins Wall of left atrium Ligamentum arteriosum Arch of aorta

Ventricles Cusp of the right AV (tricuspid) valve Right ventricle Wall of the right ventricle Trabeculae carneae Interventricular septum Right and left bundle branches Wall of the left ventricle Papillary muscle Left ventricle Chordae tendineae Cusp of left AV (bicuspid/mitral) valve Aortic semilunar valve

Heart 2 - external anatomy Superior vena cava Right atrium Right ventricle Left ventricle Left atrium Pulmonary trunk Aorta

Heart 2 - internal anatomyHeart2/Heart2_IntAnatomy.png Ascending aorta Superior vena cava Right coronary artery Pulmonary semilunar valve Right atrium Opening of the inferior vena cava Cusp of right AV (tricuspid) valve Right ventricle Apex Left ventricle Interventricular septum Left atrium Pulmonary veins Pulmonary trunk Arch of aorta Ligamentum arteriosum

Heart 2 - right atrium Right ventricle Superior vena cava Opening of suprior vena cava Fossa ovalis Opening of inferior vena cava Opening of coronary sinus Right atrium Opening of right AV valve going to the right ventricle Pulmonary semilunar valve Pulmonary trunk Right coronary artery Aorta

Heart 2 - left atrium and ventricle Aortic semilunar valve Interventricular septum Left AV (bicuspid/mitral) valve Left ventricle Wall of left ventricle Left atrium Openings of four pulmonary veins Left pulmonary artery Pulmonary trunk Left pulmonary veins Arch of aorta