Bio, words and definitions

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Across
  1. 4. a piece of writing written by a person about his or her own life
  2. 5. a piece of writing about a person's life written by someone else
  3. 6. a person who studies living things
  4. 7. a medicine used to save lives because it destroys harmful bacteria and cures infections
  5. 8. the removal of living tissue from the body for diagnostic examination (which means to examine or test it to diagnose what the illness is)
  6. 10. the study of the nervous system of living things and how it helps the living things learn and react
Down
  1. 1. the study of the nervous system of living things and how it helps the living things learn and react
  2. 2. the study of living things
  3. 3. a diet thought to help people live longer because it focuses on natural foods
  4. 9. the zone of planet Earth where there is life (between the deep crust and the lower atmosphere)