Detailed dissection of heart

Ventricular myocardium; cardiac valves and ostia, basal view

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Image #120-6

Detailed dissection of heart

Ventricular myocardium; cardiac valves and ostia, basal view

The atria have been cut off close to their attachments to the atrioventricular valve rings.

1. Pulmonary trunk
2. Right semilunar cusp
3. Anterior semilunar cusp
4. Left semilunar cusp (together 2-4 make up the pulmonary valve
5. Nodule of valve
6. Left coronary artery (at origin from aortic sinus)
7. Ascending aorta
8. Left fibrous trigone
9. Left ventricle
10. Left atrioventricular opening
11. Anterior cusp of mitral valve
12. Posterior cusp of mitral valve
13. Myocardium left atrium (cut across)
14. Right fibrous trigone
15. Atrioventricular bundle (bundle of His)
16. Posterior interventricular sulcus
17. Right atrioventricular opening
18. Conus arteriosus
19. Left semilunar cusp (aortic)
20. Upper pointer: Right semilunar cusp Lower pointer: posterior semilunar cusp (of aortic valve)
21. Right coronary artery (at origin from aortic sinus)
22. Atrioventricular septum
23. Anterior semilunar cusp (pulmonary)
24. Septal (medial) cusp of tricuspid valve
25. Posterior cusp tricuspid valve
26. Right ventricle
27. Myocardium right atrium (cut across)