Across
- 4. Beat of the heart as felt through the walls of the arteries
- 5. Small artery
- 9. The largest artery in the body
- 12. Structure in veins or in the heart that temporarily closes an opening so that blood flows in one direction
- 14. Innermost lining of blood vessels
- 16. Gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells
Down
- 1. Double layered membrane surrounding the heart
- 2. One of two lower chambers of the heart
- 3. A small vein
- 6. Inner lining of the heart
- 7. Abnormal swishing sound caused by improper closure of the heart valves
- 8. Contraction phase of the heartbeat
- 10. Largest type of blood vessel; carries blood away from the heart to all parts of the body
- 11. An electronic apparatus implanted in the chest to stimulate heart muscle that is weak and not functioning
- 13. Thin-walled vessel that carries blood from body tissues and lungs back to the heart
- 15. Muscular, middle layer of the heart