Across
- 4. Gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells
- 5. Smallest type of blood vessel.
- 6. Innermost lining of blood vessels.
- 10. One of two lower chambers of the heart.
- 11. Largest artery in the body.
- 13. Relaxation phase of the heartbeat.
- 14. Abnormal swishing sound caused by improper closure of the heart valves
Down
- 1. Beat of the heart as felt through the walls of the arteries.
- 2. Muscular middle layer of the heart.
- 3. Contraction phase of the heartbeat.
- 7. Inner lining of the heart.
- 8. Thin-walled vessel that carries blood from body tissues and lungs back to the heart.
- 9. Small artery.
- 10. Small vein.
- 11. One of two upper chambers of the heart.
- 12. Largest type of blood vessel; carries blood away from the heart to all parts of the body