Human Body Systems

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Across
  1. 2. tiny balloon like air sacs in the lungs
  2. 5. nerve cell
  3. 6. pumps blood throughout the body
  4. 7. causes the lungs to expand and contract
  5. 8. removes waste
  6. 13. directs sugar to cells
  7. 16. a group that makes up the endocrine system
  8. 18. muscles you have no control over
  9. 19. detects information from the environment and controls body functions
  10. 20. transports materials to and from cells
  11. 22. supports and protects the body
  12. 25. the maintenance of stable internal conditions in an organism
  13. 26. muscles you can control
Down
  1. 1. protects bones when they rub against each other
  2. 3. controls many processes by releasing chemicals
  3. 4. master gland
  4. 9. takes in oxygen and eliminates carbon dioxide
  5. 10. enable movement of the body and internal organs
  6. 11. creates blood cells
  7. 12. breaks down food and absorbs nutrients
  8. 14. controls metabolism
  9. 15. organs in the skeletal system
  10. 17. a place where two bones come together
  11. 21. carries blood to the heart
  12. 23. raises/lowers sugar levels in the blood
  13. 24. chemical messengers secreted by glands