This image shows the anatomy of the heart from interior view in a longitudinally sectioned heart showing its internal structures and features along with the related vessels.also this image shows the track of the nervous impulses inside the heart starting from the S.A. node to the Purkinje fibers (that track transmits the nervous impulses that originate at the S.A. node to the rest of the heart muscle fibers)
showing:
1. Superior vena cava
2. Aorta
3. Pulmonary artery
4. Right atrium
5. S.A. node
6. A.V. node
7. His bundle
8. Tricuspid valve
9. Right ventricle
10. Inferior vena cava
11. Right and left bundle branches
12. Left ventricle
13. Purkinje fibers
14. Pulmonary veins
15. Mitral valve
16. Left atrium
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