Across
- 1. contraction phase of the heartbeat
- 4. small vein
- 7. smallest type of blood vessel
- 10. one the the upper chambers of the heart
- 11. innermost lining of blood vessels
- 13. relaxation phase of the heartbeat
- 14. largest artery in the body
- 15. record of the electrical activity of the heart
Down
- 1. instrument to measure blood pressure
- 2. abnormal swishing sound caused by improper closure of the heart valves
- 3. inner lining of the heart
- 5. beat of the heart as felt through the walls of the arteries
- 6. valve located between the right atrium and the right ventricle; has 3 leaflets
- 8. Small artery
- 9. other word for sinoatrial node
- 12. Muscular middle layer of the heart