Across
- 6. carry blood back to the heart
- 7. the finest blood vessels that branch from the arteries
- 9. your body's transport system
- 11. a build-up on the inner wall of the arteries
- 12. muscle that does not get tired
- 13. a fatty substance that moves to an inflamed area to protect it
Down
- 1. the chemical that gives the red blood cell it's colour
- 2. a condition in which a lack of oxygen is supplied to the heart muscle
- 3. oxygen-rich blood
- 4. the beating feeling felt in the neck and wrist
- 5. blood with little oxygen and lots of carbon dioxide
- 8. carry blood away from the heart
- 10. a dangerous blood clot that can cause death