Human body system at work

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Across
  1. 4. The muscle that helps your lungs breathe.
  2. 5. Good habits like brushing teeth and washing hands are called good _____.
  3. 10. This organ helps you think and control your body.
  4. 11. These organs clean your blood and make urine.
  5. 14. This part connects your brain to the rest of your body.
  6. 16. The organ where digestion begins after chewing.
  7. 17. The body system made of bones.
  8. 18. The gas your body needs to breathe and survive.
  9. 20. The body system that removes waste through urine.
  10. 21. You should wear this when skateboarding to protect your head.
  11. 22. A bad habit that damages the respiratory system.
  12. 24. This organ pumps blood through your body.
Down
  1. 1. Tiny blood vessels where oxygen exchange happens.
  2. 2. The long organ where most nutrients are absorbed.
  3. 3. The action of breathing air into your lungs.
  4. 6. The movement of food through the digestive system.
  5. 7. The process of taking nutrients into the blood.
  6. 8. The process of removing waste from the body.
  7. 9. This system transports oxygen and nutrients in the blood.
  8. 12. The system that controls your movements and messages in the body.
  9. 13. You use these to move your body.
  10. 15. The system that helps you breathe.
  11. 17. This protects your head and brain.
  12. 19. The tube that carries food to the stomach.
  13. 23. Healthy food gives your body these important substances.