Across
- 3. - Detects changes
- 4. - Food breakdown
- 8. - Breathing process
- 10. - Defense against disease
- 11. - Involuntary response
- 14. - Bones and cartilage
- 15. - Pertaining to cells
- 17. - Related to hormones
- 18. - Breathing system
- 19. - Chemical messenger
- 21. - Heart and blood vessels
- 23. - Temperature control
- 24. - Chemical reactions in cells
- 28. - Nerve signal connection
- 29. - Body's internal balance
- 30. - Nerve signal carrier
Down
- 1. - Making offspring
- 2. - Muscle contractions in digestion
- 5. - Water balance control
- 6. - Kidney-related
- 7. - Muscle shortening
- 9. - Nerve cell
- 12. - Hormone system
- 13. - Self-regulating mechanism
- 16. - Blood flow in the body
- 20. - Heart-related
- 22. - Communication network
- 25. - Related to muscles
- 26. - Cellular energy molecule
- 27. - Food processing