Across
- 3. vital organ
- 6. negative condition
- 7. plural of atrium
- 9. carry blood to the heart
- 12. exchange substances with cells
- 14. lump of blood
- 16. liquid that carries everything
- 17. the hearts four different sections
- 19. tube that blood moves in
- 20. small fragments of cells
Down
- 1. high blood pressure
- 2. fight against disease
- 4. abnormal heartbeat
- 5. the main and largest artery
- 8. carry blood away from the heart
- 10. carries oxygen
- 11. tissue that transports substances
- 13. delivery service for your body
- 15. organelle that contains DNA
- 18. biconcave shaped thing