Across
- 1. innermost lining of blood vessels
- 4. arteries two common carotid arteries located on each side of the neck branch
- 7. node peacemaker
- 11. small vein
- 12. muscle middle layer of the heart
- 14. relaxation phase of the heartbeat
Down
- 1. record of the electricity of the heart
- 2. double-layered membrane surrounding the heart
- 3. contraction phase of the heartbeat
- 5. valve located between the right atrium and the right ventricle
- 6. valve bicuspid valve
- 8. instrument to measure blood pressure
- 9. visualizing the interior of blood vessels
- 10. largest artery in the body
- 13. beat of the heart as felt through the walls of the arteries