Across
- 4. largest artery in the body
- 6. lower tip of the heart
- 8. partition or wall dividing a cavity
- 9. record of electrical activity of the heart
- 10. innermost lining of blood vessels
- 12. muscular middle layer of the heart
- 14. Thin-walled vessel that carries blood from body tissues and lungs back to the heart
- 15. relaxation phase of the heartbeat
Down
- 1. double-layered membrane surrounding the heart
- 2. inner lining of the heart
- 3. contraction phase of the heartbeat
- 5. small vein
- 7. smallest type of blood vessel
- 11. beat of the heart as felt through the walls of the arteries
- 13. one of the two lower chambers of the heart