Across
- 2. ensures blood flows in the correct direction
- 4. blood enters heart here
- 6. force exerted by blood on walls of vessels
- 8. made of cardiac muscle
- 11. valve that separates left atrium and left ventricle
- 12. smallest vessels that bring blood back to the heart
- 14. keep heart beating regularly
- 15. two leaf valve
Down
- 1. only vein that carries blood away from the heart
- 2. blood leaves the heart from here
- 3. carry blood to the heart
- 5. valve that separates right atrium and right ventricle
- 7. only artery that carries blood to the heart
- 9. take blood away from heart
- 10. area where oxygen is exchanged for carbon dioxide
- 13. vessel in which blood enters the heart