1. Sheep Heart

2. Left Auricle Anterior longitudinal sulcus You can find the anterior side of the heart by finding the auricle that you can see completely; it is the left auricle. The anterior longitudinal sulcus is on that side and the coronary sinus is on the posterior side.

3. What LAYER of tissue is this? Endocardium (inside all chambers where blood touches) Myocardium (meaty areas of brown muscle Visceral pericardium (outer shiny surface of heart) Apex

4. What CHAMBER is this? Right atrium What CHAMBER is this? Left atrium What CHAMBER is this? Right ventricle What CHAMBER is this? Left ventricle Apex

5. Atrial septum Right atrium Left atrium Tricuspid valve Mitral (bicuspid) valve Left ventricle Right ventricle Apex Apex Interventricular septum

6. Aortic semilunar valve Mitral (bicuspid) valve Cordaetendonae Papillary muscles Trabeculaecarnae

7. Aortic semilunar valve Mitral (bicuspid) valve Cordaetendonae Papillary muscle Trabeculaecarnae

8. Mitral (bicuspid) valve

9. Mitral (bicuspid) valve Papillary muscle

10. Tricuspid valve

11. Atrial septum Right atrium Left atrium Tricuspid valve Mitral (bicuspid) valve Left ventricle Right ventricle Apex Apex Interventricular septum

12. Pulmonary trunk Aorta Superior vena cava

13. Aorta Pulmonary trunk, which branches into pulmonary arteries Pulmonary veins enter Left atrium Aortic semilunar valve

14. Aorta

15. Superior vena cava Inferior vena cava Pulmonary vein

16. Pulmonary artery (leaving right ventricle)

17. Pulmonary artery as seen from back of heart (leaving right ventricle) Coronary sinus (back of heart)

18. Moderator band (right ventricle only)

19. Moderator band

20. Inferior View of the Heart Figure 18.5d

21. Posterior view of heart Trachea Superior vena cavae Aorta Pulmonary veins Pulmonary veins Left Atrium Right Atrium Coronary sinus Inferior vena cavae Posterior interventricular artery

22. Coronary Sinus (back vein of heart)

23. Coronary Sinus (back vein of heart)

24. Pectinate Muscles are parallel ridges in the walls of the atria of the heart. They resemble the teeth of the comb.

25. Ascending Aorta

26. Marginal arteries

27. Pulmonary semilunar valve Mitral (bicuspid) valve Aortic semilunar valve (look deep under here) Tricuspid valve Cordae tendonae Papillary muscles Trabeculae carnae

28. Pulmonary trunk Pulmonary veins R. Coronary artery L. Coronary artery Anterior interventricular artery Circumflex artery

29. Left common carotid artery R. common carotid artery R. subclavian artery R. Brachiocephalic artery Left subclavian artery Aorta Superior vena cava Pulmonary trunk L. Pulmonary artery