Across
- 3. What regulates the body's growth
- 4. Has skeletal muscle
- 7. Respiratory system:taking in____
- 9. Maintains body ______
- 10. Major organ in the Endocrine system
- 12. Most important in Excretory system
- 13. What is the biggest organ on a human body
- 14. What system breaks down food
- 17. When you do it on instinct
- 19. Cushion between bones
- 20. Most important part of the digestive system
Down
- 1. Supports and protects the organs
- 2. Send messages to the brain
- 5. Protects internal organs
- 6. taking in oxygen and letting out ______
- 8. What connects muscles to the skeleton
- 11. What system uses blood to transport
- 15. What gets rid of waste from the blood
- 16. How many systems in the human body
- 18. Bone marrow makes _______