General science 2nd semester

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Across
  1. 3. chemical substance that humans need in small amounts
  2. 4. a consumer that eats both consumers and producers
  3. 6. a consumer that eats producers exclusively
  4. 8. blood vessels that carry blood back to the heart
  5. 11. A group of cells that prepare a chemical for the body
  6. 12. a cell that has no distinct membrane bound organelles
  7. 15. thin walled structures that allow exchange of chemicals
  8. 17. a consumer that only eats other consumers
Down
  1. 1. Process where your body breaks down food
  2. 2. A messenger that tells when to release a chemical that changes the body
  3. 5. a weakened or inactive version of a pathogen
  4. 7. a body covering, typically made out of chiton
  5. 9. process where plants take energy to make their food
  6. 10. Two or more atoms linked together
  7. 13. blood vessels that carry blood away from the heart
  8. 14. a cell with a distinct membrane bound organelles
  9. 16. The smallest unit of matter