Across
- 2. smallest blood vessel
- 3. The middle muscular layer of heart wall
- 4. contraction phase of heart beat.
- 6. small vein
- 7. relaxation phase of heart beat.
- 9. inner lining of the heart
- 11. largest vein in the body
- 12. rhythm normal heart rhythm.
- 14. upper change of heart
- 15. record used to detect electrical current
Down
- 1. valve between left atrium and left ventricle
- 5. node the pacemaker of the heart
- 8. sac-like membrane surrounding heart
- 10. carries oxygen poor blood from the body
- 13. carries oxygenated blood away from the heart
- 14. blood is pumped out of left ventricle into valve