Health puzzle

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Across
  1. 3. A body incision or operation by a doctor.
  2. 5. Someone who cannot talk.
  3. 7. A tooth doctor.
  4. 8. A physical or mental disability.
Down
  1. 1. Opposite of able.
  2. 2. Removal of one body part.
  3. 4. A walking aid.
  4. 6. Someone who cannot see.
  5. 7. Someone who cannot hear.