Across
- 1. absorbs nutrients
- 5. gives structure and support to the body
- 9. includes brain, spine, and nerves
- 10. all body systems work to maintain _______
- 12. barrier from external environment
- 14. _______ feedback amplifies
- 15. another word for immune system
Down
- 2. regulates hormone production
- 3. exchanges oxygen and carbon dioxide
- 4. different between males and females
- 6. another word for urinary system
- 7. transports molecules through the body
- 8. _______ feeback does the opposite of the response
- 11. includes heart, blood, and blood vessels
- 13. allows the body to move