Across
- 4. Relaxation phase of the heartbeat
- 7. One of two lower chambers of the heart
- 10. largest artery in the body
- 12. Record of the electrical activity of the heart
- 14. Abnormal swishing sound caused by improper closure of the heart valves
- 15. Contraction phase of the heartbeat
Down
- 1. Muscular middle layer of the heart
- 2. Instrument to measure blood pressure
- 3. Double-layered membrane surrounding the heart
- 5. small vein
- 6. Thin-walled vessel that carries blood from body tissues and lungs back to the heart
- 8. Inner lining of the heart
- 9. Smallest type of blood vessel
- 11. One of two upper chambers of the heart
- 13. Beat of the heart as felt through the walls of the arteries.