Across
- 3. The phase when the heart relaxes and fills with blood.
- 5. Cycle – One complete heartbeat, including contraction and relaxation.
- 8. The phase when the heart contracts and pumps blood out.
- 11. A blood vessel that carries blood away from the heart.
- 15. A test that records the heart’s electrical activity.
- 17. The muscular wall of the heart.
- 19. The lower chamber of the heart that pumps blood out.
- 20. A cluster of heart cells that start or control electrical signals.
Down
- 1. The felt beat of the heart as blood moves through arteries.
- 2. The process of electrical signals moving through the heart.
- 4. The smallest blood vessel where oxygen and nutrients are exchanged.
- 6. The largest artery that carries blood from the heart to the body.
- 7. Rate, The number of times the heart beats per minute.
- 9. The upper chamber of the heart that receives blood.
- 10. Pressure, The force of blood pushing against artery walls.
- 12. – A wire or view in an ECG that records heart activity.
- 13. A blood vessel that carries blood back to the heart.
- 14. Short for electrocardiogram, the test that tracks heart’s electrical signals.
- 16. – The flow of blood through tissues to supply oxygen.
- 18. Relating to the heart and blood vessels.