Across
- 4. fast-acting control system
- 7. breaks down food
- 10. this is removed in the respiratory system
- 12. this is eliminated in the urinary system
- 14. returns fluids to blood vessels
Down
- 1. main organ of the endocrine system
- 2. transports materials in body
- 3. organ that works with bladder and ureters in the urinary system
- 5. production of offspring
- 6. muscular system does this when the body is too cold
- 8. secretes regulatory hormones
- 9. forms the external body covering
- 11. allows locomotion
- 13. organ that sends the messages in nervous system
- 14. main organ used in the respiratory system