The document describes the internal features of the heart, including the right and left atria and ventricles, interventricular septum, and valves. The right atrium and ventricle pump deoxygenated blood to the lungs, while the left atrium and ventricle pump oxygenated blood from the lungs to the rest of the body. Valves such as the tricuspid, mitral, aortic and pulmonary valves allow blood to flow in one direction through the heart chambers.

1. Anatomy of the Thorax
Internal features of the heart
By : Adham A. El-Mallah
Teaching assistant of human Anatomy and
Embryology
Faculty of medicine , Alexandria university

2. • The internal anatomy of each chamber is
critical to its function

3. Right atrium

4. Right ventricle

5. Left Atrium

6. Left ventricle

7. Interventricular septum

9. Valves
Semilunar valves
Atrio-ventricular valves

11. Atrio-ventricular valves: Tricuspid valve

13. Atrio-ventricular valves: Mitral valve

15. Semilunar valves: Aortic valve

16. Semilunar valves: Pulmonary valve

17. • Thank you