Across
- 4. Muscular tissue of the heart.
- 5. Lower chamber of The largest.
- 9. Test that records the electrical activity of the heart.
- 10. Blood vessels that carry blood away from the heart.
- 11. Upper chamber of the heart.
- 12. largest artery in the body.
- 14. Device that regulates heartbeats.
- 15. Phase when the heart muscle contracts.
Down
- 1. Related to the heart.
- 2. Blood vessels that carry blood to the heart.
- 3. Membrane surrounding the heart.
- 6. Heartbeat felt through the walls of arteries.
- 7. Phase when the heart muscle relaxes.
- 8. Smallest blood vessels where gas exchange occurs.
- 13. Structures that prevent backflow of blood in the heart.