Across
- 4. Blood circulation from the Heart to Lungs to Heart
- 5. Muscular middle layer of the heart
- 7. The thickest of the four walls of the heart
- 11. Relaxation phase of the heartbeat
- 15. The largest single artery in the body
- 16. Device used to measure blood pressure
Down
- 1. Fibrous sac surrounding the heart
- 2. The beat of your heart
- 3. Contraction phase of the heartbeat
- 6. One endothelial cell in thickness
- 8. Interior layer of the heart
- 9. Artery that supplies blood to the head and neck
- 10. Exhaled waste product from the blood
- 12. Carries blood away from the heart
- 13. Carries blood back to the heart
- 14. Abnormal swishing sound of the heart
- 17. One of two upper chambers of the heart