Across
- 2. a push or pull
- 6. Disease Fighters
- 7. Fluid that consists of water and glucose and dissolved materials
- 8. group of cells that sends out signals to make the heart muscle contract
- 11. tissue that prevents blood from flowing backward
- 13. Artery walls thicken
- 14. Silent killer
- 16. Small knobs of tissue that allow the fluid to flow through
- 18. First branch to the aorta
- 21. Give blood to someone else
- 24. network of veinlike vessels that return the fluid to the bloodstream
- 26. Combines with oxygen to make the cells bright red
Down
- 1. organ that pumps blood
- 3. tiny vessels where substances are exchanged between blood and body cells
- 4. Instrument used to measure blood pressure
- 5. Liquid part of blood
- 9. system that carries needed substances to cells and carries waste products away from cells
- 10. Lower chamber of the heart
- 12. Larger blood vessels that carry blood back to the heart
- 15. Forms blood clots
- 17. Transfer oxygen throughout your body
- 19. Upper chamber of the heart
- 20. blood vessels that carry blood away from the heart
- 22. largest artery in the body
- 23. Chemicals that make nets
- 25. Heart muscle is blocked