Across
- 6. structure and support
- 7. regulates hormones
- 9. fights off infections
- 10. circulates blood throughout
- 11. removes liquid waste
Down
- 1. inhales and exhales
- 2. barrier from the outside
- 3. reproduce and keep the species alive
- 4. contracts to allow movement
- 5. sends communication signals
- 8. absorb nutrients and rids of waste