Across
- 3. eliminates nitrogenous waste
- 4. breaks down food
- 5. returns fluid to blood vessels
- 6. main organ in nervous system
- 7. secretes regulatory hormones
- 9. production of offspring
- 12. protects and supports body organs
- 13. forms external body covering
- 15. system that removes carbon dioxide
Down
- 1. allows locomotion
- 2. allows for nutrient absorption
- 8. transports materials in the body
- 10. pumps blood throughout the body
- 11. keeps blood supplied with oxygen
- 14. fast-acting control system