Organ systems

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Across
  1. 5. brings air into body.
  2. 9. delivers oxygen through the body.
  3. 10. extracts nutrients from food.
  4. 11. provides movement.
Down
  1. 1. Outer layer.
  2. 2. The support structure.
  3. 3. provides offspring.
  4. 4. provides feelings of pain, etc.
  5. 6. Controls metabolism.
  6. 7. assists in homeostasis.
  7. 8. maintains fluid balance.