Across
- 1. The pointed, lower tip of the heart
- 6. _________ muscles primarily attached to the atrioventricular valves
- 8. The heart chamber that receives deoxygenated blood
- 10. A heart valve that prevents backflow of blood into the left ventricle
Down
- 2. The outer surface of the heart
- 3. The heart has _______ chambers
- 4. The blood vessel that carries oxygenated blood back to the heart
- 5. _________ arteriosus is a remnant of the ductus arteriosus
- 7. The main artery carrying blood away from the heart
- 9. The ___ node is the pace maker of the heart
- 11. The two chambers of the heart that receive blood