Body Systems

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