Across
- 3. lining of the heart
- 4. contraction phase of the heartbeat
- 6. the largest artery in the heart
- 11. sinoatrial node
- 12. flow of blood from heart to lungs
- 13. carry blood toward the heart
- 14. high blood pressure
Down
- 1. small vein
- 2. beat of the heart
- 5. a gas brought in by the lungs and pumped throughout the body by the heart
- 6. large blood vessels that carry blood away from the heart
- 7. arteries that supply blood to the head and neck
- 8. prevent the backflow of blood
- 9. one of the lower chambers of the heart
- 10. relaxation phase of the heartbeat