Medical Term,

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Across
  1. 2. breaking down
  2. 4. pertaining to the skull
  3. 5. Closer to the center of the body or the point of attachment
  4. 8. 21 genetic condition caused by an extra chromosome
  5. 9. relating to the lower back
Down
  1. 1. Area between abdomen and thighs
  2. 2. operation to open skull
  3. 3. reticulum net like structure
  4. 6. builds complex molecules
  5. 7. converts food to fuel