Body Systems, Plus

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Across
  1. 2. at the producer level of an energy pyramid there are 50,00 KCAL. How many KCAL would be at the tertiary level?
  2. 4. protects from UV rays
  3. 5. cells working together form
  4. 9. a protein that speeds up chemical reactions
  5. 11. considered the highway of body systems, cause it delivers
  6. 12. combining organ systems would create this
  7. 13. another word for eat
  8. 15. the waste product for this body system is carbon dioxide
  9. 16. breaks food down by grinding or churning
  10. 18. this ecosystem would consist of whales and phytoplankton
  11. 19. grape-like sacs, gas exchange occurs here
  12. 20. finger-like projects in small intestines allows for nutrients to be absorbed
Down
  1. 1. another word for job or purpose
  2. 3. this system removes waste products from the body
  3. 6. from the mouth food passes through this organ
  4. 7. system is the first line of defense versus injury and infection
  5. 8. pumps blood out of the heart and lungs
  6. 10. contracts and relaxes move air through the body
  7. 14. the windpipe of the body
  8. 17. form of digestions that breaks food down into smaller molecules