Puzzle

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Across
  1. 2. Bones make up this system
  2. 3. System protecting against pathogens
  3. 6. System exchanging gases with the environment
  4. 7. Moves the body
Down
  1. 1. Breaks down food
  2. 4. System that controls and coordinates actions
  3. 5. System that makes hormones
  4. 8. Filters blood and makes urine