Heart anatomy

This image shows the anatomy of the heart from external posterior view showing the different parts and features of the heart with the related vessels

showing:
1. Superior vena cava
2. Aortic arch
3. Right Pulmonary artery
4. Left atrium
5. Right pulmonary veins
6. Right atrium
7. Oblique veins
8. Inferior vena cava
9. Small cardiac vein
10. Right coronary artery
11. Coronary sinus
12. Right posterior interventricular arteries
13. Middle cardiac vein
14. Right ventricle
15. Left ventricle
16. Left posterior ventricular vein
17. Posterior atrial artery
18. Circumflex artery
19. Great cardiac artery
20. Left auricle
21. Left pulmonary veins
22. Left pulmonary artery