Across
- 2. relaxation phase of the heartbeat
- 4. flow of blood from the heart to the lungs and back
- 7. located between the right atrium and ventricle
- 9. Largest artery in the body
- 11. nervous tissue in right atrium that begins the heartbeat
- 12. contraction phase of the heartbeat
- 13. record of electrical activity of the heart
- 14. beat of the heart
- 15. small vein
Down
- 1. membrane surrounding the heart
- 3. largest vein in the body
- 5. abnormal swishing sound from improper closure of the heart valves
- 6. inner lining of the heart
- 8. innermost lining of blood vessels
- 9. small artery
- 10. middle layer of the heart