1. Ex. 41 Structure of the Heart

2. Fibrous pericardium (outermost)

3. Parietal pericardium (inside lining of outer covering)

4. Percardial cavity (space between)

5. Epicardium (visceral pericardium)

6. Myocardium (cardiac muscle)

7. Intercalated disc*

8. Musculi pectinate

9. Papillary muscle

10. Chordae tendineae

11. Trabeculae carneae (folds of muscle in ventricle)

12. Moderator band

13. Endocardium (inner lining of heart)

14. Ligamentum arteriosum

15. Right Atrium

16. Right auricle

17. Superior vena cava

18. Inferior vena cava

19. Coronary sinus

20. Interatrial septum

21. Tricuspid valve

22. Rt. ventricle

23. Interventricular septum

24. Pulmonary (semilunar) valve

25. Pulmonary trunk

26. Pulmonary arteries (L & R )

27. Left atrium

28. Left auricle

29. Pulmonary veins (R & L) – posterior view

30. Mitral (bicuspid) valve

31. Left ventricle

32. Aortic valve (above bicuspid valve medial cusp)

33. Aorta

34. Systemic Circulation

35. Cardiac circulation

36. Left coronary artery (only seen if auricle is open)

37. Circumflex artery

38. Anterior interventricular artery

39. Right coronary artery

40. Marginal artery

41. Posterior interventricular artery

42. Great cardiac vein

43. Middle cardiac vein

44. Next Ex. 44 Blood Vessels