Body systems daphne

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Across
  1. 4. carbon dioxide is removed and oxygen enters the blood through here
  2. 5. one of the jobs of the endocrine system
  3. 6. muscles that contract when you straighten your arm
  4. 10. the system that supplies your body with oxygen
  5. 11. most food gets broken down here
  6. 15. messages are send there
  7. 16. chemicals send out by the endocrine glands
  8. 18. the system that allows you to move
  9. 19. ligaments in a joint that are overstretched or twisted
Down
  1. 1. the main organ of the circulatory system
  2. 2. send and receive information from the brain
  3. 3. the master gland
  4. 7. the bottom two chambers of the heart
  5. 8. the process of food getting broken down
  6. 9. tiny connecting blood vessels
  7. 12. the system that works together with the muscles to help you stand upright
  8. 13. blood carries this around your body
  9. 14. a fluid that softens food to break it down easier
  10. 17. muscles found on the inside of your heart
  11. 18. a tissue in a bone