Across
- 3. Organ used by fish to obtain oxygen
- 5. When people around you persuade you to do something
- 8. This system includes bones
- 9. The addictive chemical found in tobacco
- 13. This system includes muscles
- 14. A drug that slows the central nervous system
Down
- 1. Source of energy for the body
- 2. This system includes the heart, blood and vessels
- 4. Takes blood to the heart
- 6. This system includes lungs
- 7. The main organs of respiration
- 10. Closes the pathway to the nose
- 11. Takes blood away from the heart
- 12. This system includes the brain and spinal cord