Clue hunt

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Across
  1. 2. future surgeon's course
  2. 3. A chemical by the name of a planet resides in me
  3. 5. study of tumors
  4. 7. Anagram of LISTERIZE
Down
  1. 1. Place me on your body to listen whats going inside
  2. 4. one name for heart test
  3. 6. photograph of bones
  4. 7. sharp cutting tool
  5. 8. where to find some very sick individuals