Across
- 1. Small vein
- 3. smallest type of blood cells transported via veins to the heart.
- 5. One of two lower chambers of the heart
- 7. Contraction phase of the heartbeat
- 8. Muscular middle layer of the heart
- 11. Double-layered membrane surrounding the heart
- 12. Abnormal swishing sound caused by improper closure of the heart valves
- 13. Beat of the heart as felt through the walls of the arteries
- 15. small artery
- 17. Largest artery in the body
Down
- 2. Record of the electrical activity of the heart
- 4. Innermost lining of blood vessels
- 6. Instrument to measure blood pressure
- 9. one of two chambers of the heart.
- 10. Relaxation phase of the heartbeat
- 14. Structure in veins or in the heart that temporarily closes an opening so that blood flows in only one direction
- 16. Inner lining of the heart