Across
- 3. send signals all around your body
- 5. cord the highway of neurons
- 6. you breathe air in
- 9. The skin system
- 10. removes waste from the body
- 13. system that reproduces
- 14. the layer that protects our inner body
- 15. Pumps blood to the body
- 18. holds the bone together
- 21. allows our body to move
- 22. male reproductive cell
- 23. the system that has a network of vessels
- 24. the bone system
Down
- 1. organ that helps you breathe
- 2. the breathing system
- 4. The middle layer of the skin
- 7. contains an acid that can burn metal
- 8. transform water into urine
- 10. The top layer of the skin
- 11. The system that contains the heart
- 12. female reproductive cell
- 16. the system that helps you digest
- 17. Carries blood in them
- 19. intestine digest food from the stomach
- 20. the most important organ