Across
- 1. Beat of the heart
- 5. Abnormal swishing sound
- 6. pacemaker of the heart
- 7. Inner lining of the heart
- 8. Record of electrical activity of heart
- 10. One of two upper chambers of the heart
- 11. Contraction phase of the heartbeat
- 12. Relaxation phase of the heartbeat
- 13. Largest type of blood vessel
Down
- 1. double layered membrane around heart
- 2. One of two lower chambers of the heart
- 3. Largest artery in the body
- 4. Small vein
- 5. Muscular middle layer of the heart
- 9. Smallest type of blood vessel