Across
- 5. Instrument to measure blood pressure
- 9. Smallest type of blood vessel
- 10. Thin-walled vessel that carries blood from body tissues and lungs back to the heart
- 11. is the One of two lower chambers of the heart
- 13. Relaxation phase of the heartbeat
- 15. Innermost lining of blood vessels
Down
- 1. Contraction phase of the heartbeat
- 2. Structure in veins or in the heart that temporarily closes an opening so that blood flows in only one direction
- 3. Inner lining of the heart
- 4. Beat of the heart as felt through the walls of the arteries
- 6. double-layered membrane surrounding the heart
- 7. Muscular middle layer of the heart
- 8. is the largest artery in the body
- 10. Small vein
- 12. Abnormal swishing sound caused by improper closure of the heart valves
- 14. Small artery