Jacob's Fish in a Tree Crossword

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Across
  1. 2. Removal of tissue to find disease
  2. 4. Impossible to perceive
  3. 5. Loss of memory
  4. 8. Comfort received by a person after tragedy
  5. 12. Cause someone to feel very bad
  6. 15. Surgical procedure on a corpse
  7. 17. Pursued in addition to the normal course of study
  8. 18. A complete destruction of something
Down
  1. 1. Deny something by using the opposite idea
  2. 3. Close observation
  3. 6. Relating to the application of scientific methods to the investigation of crime
  4. 7. An examination of someone’s own mental health
  5. 9. An opening on a house that allows air to flow through
  6. 10. Marked by using irony
  7. 11. To change form or character of
  8. 13. Extreme tiredness resulting from mental or physical exertion or disease
  9. 14. Relationship
  10. 16. Move away from a certain point