Across
- 2. bone that protects the brain
- 4. the exchange of oxygen and carbon dioxide
- 7. type of muscle that are found in the heart
- 9. controls the body
- 10. type of muscle that is connected to bones
- 11. first phase of the heart beating
- 12. the air only pipe
- 13. tiny hair inside the nose
- 15. type of muscle that look smooth
- 17. carries blood to the heart
- 18. carries the blood away from the heart
- 20. the most complex part of the brain
Down
- 1. bone cells that make new bones
- 3. protects the heart and lungs
- 5. carries air
- 6. second phase of the heart beating
- 8. protein that makes bones
- 14. where you information is stored
- 16. nervous system’s cells
- 19. a muscle located in front of the upper arm