Across
- 4. Artery that carries oxygen-poor blood from the heart to the lungs.
- 5. Small vein.
- 6. Recording of electrical activity of the heart.
- 8. Gas that enters the blood through the lungs.
- 9. One of upper chambers of the heart.
- 10. Smallest blood vessel.
- 12. Lower part of the heart.
- 13. Relaxation phase of a heartbeat.
- 14. Muscular middle layer of the heart.
Down
- 1. Type of circulation or flow of blood to the heart and back.
- 2. Arteries located on either side of the neck.
- 3. Abnormal swishing sound from improper closure of heart valves.
- 6. Innermost lining of blood vessels.
- 7. Largest artery in the body.
- 11. Artery that carries oxygen-rich blood to the heart.