Crossword

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Across
  1. 3. from bacteria.
  2. 5. If you are for something, you are responsible
  3. 7. If you something, you do or make it in the
  4. 12. An does something as a hobby and not as
  5. 13. blood from the heart to every part of
  6. 15. system.
  7. 17. to do what it should.
  8. 19. stomach and digestive organs.
Down
  1. 1. Something that is totally is very clean and
  2. 2. accountable for it.
  3. 4. The of something is its effectiveness and
  4. 6. are parts of the body that are artificial
  5. 8. body.
  6. 9. The is the part of the body that contains
  7. 10. An is a blood vessel (one of many) that carries
  8. 11. have been closely linked or form part of the
  9. 14. same way as the original.
  10. 16. are used to replace natural ones.
  11. 18. If you have one thing with another, the