Unit 2 Crossword

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Across
  1. 1. System that takes in food.
  2. 7. System that allows for movement by contracting.
  3. 10. Organ in the skeletal system, starts with a B.
  4. 11. System that removes waste products from cellular metabolism.
  5. 12. Organ in the nervous system, starts with a B.
  6. 15. The least complex segment of the levels of organization.
  7. 17. System that allows organisms to reproduce which prevents their species from becoming extinct.
  8. 20. Hormone in the immune system
  9. 21. Organ in the respiratory system, starts with an N.
  10. 24. System that stores and carries WBC's that fight disease.
  11. 26. System that protects organs.
  12. 27. The 4th most complex segment of the levels of organization.
Down
  1. 2. System that barriers against infections.
  2. 3. Organ in the excretory system, starts with a K.
  3. 4. System that transports materials to and from cells.
  4. 5. The 3rd most complex segment of the levels of organization.
  5. 6. System that regulates body activities using hormones.
  6. 8. System that gathers and interprets information.
  7. 9. System that fights off foreign invaders in the body.
  8. 13. Organ in the muscular system, starts with a C.
  9. 14. Organ in the digestive system, starts with an M.
  10. 16. A theory that states that all living things are made of cells, cells come from pre-existing cells, and cells are the basic unit of life.
  11. 18. The most complex segment of the levels of organization.
  12. 19. Organ in the endocrine system, starts with a G.
  13. 22. System that takes in oxygen and removes carbon dioxide and water.
  14. 23. Organ in the circulatory system, starts with an H.
  15. 25. The 2nd most complex segment of the levels of organization.