Across
4. Right AV Valve
7. another term for the bicuspid valve
8. extensions of the atrium
9. Thin, slick sheet of connective tissue located on the inner surface of the myocardium
11. the inferior tip of the heart
12. is a small depression on the medial wall of the atrium
15. receives oxygenated blood from the pulmonary veins
17. continuations of the electrical system of the heart that follows the outer walls of the ventricle
18. divides the ventricles
19. Double walled sac that surrounds the heart
20. Valves between the atria and the ventricles
22. muscle bundles on the walls of the ventricles
23. prevent the cardiac muscle cells from separating
24. valves to the main vessels
26. initiates the signal causing atrial contraction
Down
1. pumps blood into the systemic circuit
2. Left AV Valve
3. initiates the signal causing ventricular contraction
5. pumps blood into the pulmonary trunk and the pulmonary circuit
6. continuations of the electrical system of the heart that follows the septal wall of the ventricle
10. receives blood that is low in oxygen from the systemic circulation
13. groove along the anterior surface of the heart
14. collagen cords attached to the AV valves
16. Composed of cardiac muscle
21. The layer of the pericardium that is closely aligned to the heart wall
25. The space between the linings of the heart