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77 EXERCISE 35 Anatomy of the Heart 4 Figure 35.5 Internal Anatomy of the Heart Y eft common carotid artery subclavian artery Sige trunk = [% eerie e x . 3 Pulmonary trunk Superior é , Jo™ vena Cava : Right may ee ue Left pulmonary \ pulmonary at =f 7 PG arteries fe arteries Ascending aorta Left pulmonary veins fossa ovalis Interatrial septum Opening of ae sinus tKortic valve Right atrium —-s usp of left AV Pectinate muscles eh valve Conus arteriosus ous of right AV (tricuspid) valve Chordae tendineae Papillary muscles ight ventricle /nierior vena cava ————== Left ventricle a interventricular septum ia Trabeculae carneae Moderator band J The papillary muscles and chordae tendineae support the right AV (tricuspid) valve. The photograph was taken from inside the right ventricle, looking toward a light shining from the right atrium. Descending aorta EA diagrammatic frontal section through the heart, showing major landmarks and the path of blood flow (marked by arrows) through the atria, ventricles, and associated vessels. Note the thickness of the left ventricular wall and interventricular septum compared to the relatively thin right ventricular wall. Left subclavian artery Left common carotid artery Brachiocephalic trunk Superior vena cava iz - . Pulmonary Ascending aorta trunk Cusp of pulmonary valve Auricle of left atrium Right atrium Cusp of left AV (bicuspid) valve Chordae tendineae Cusps of right AV Papillary muscles (tricuspid) valve Left ventricle Trabeculae carneae Right ventricle interventricular septum fF Anterior view of a frontally sectioned heart showing internal features and valves. 
