Medicine and medication

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Across
  1. 3. /into the vein
  2. 5. /via skin or mucous membranes
  3. 7. /between cheek and teeth
  4. 8. /beneath the dermis
Down
  1. 1. /attraction to receptor and stimulates it
  2. 2. /respiratory system through...
  3. 3. /into the skin
  4. 4. /on the tongue
  5. 6. /under the tongue