Across
- 3. strong tissue that prevents valves turning inside out
- 6. blood pressure as heart contracts
- 8. vessel carrying blood back towards the heart
- 9. controls the rate of a heartbeat - sometimes artificially
- 11. circulation for the lungs
- 12. main vein of the body
- 15. receiving chamber for blood from the body
- 17. tiny blood vessel for exchange of materials between blood and tissues
- 18. the main artery
- 20. vessels that carries blood away from the heart
- 21. operation to get past a blocked coronary artery
Down
- 1. pumping chamber of the heart forcing blood to the body
- 2. can be raised by stress or excitement
- 4. blood pressure as the heart relaxes
- 5. structure that ensures one-way blood flow
- 7. this can increase the risk of heart disease, as well as damage the lungs
- 10. benefits the heart, but too much can be dangerous
- 13. lipids which may block blood vessels
- 14. tissue that contracts as the heart, beats
- 16. count of the beats of the heart
- 19. artery supplying the heart muscle with oxygen and glucose