science anatomy

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Across
  1. 2. holds urine.
  2. 3. breathe air.
  3. 4. empties urine.
  4. 5. controls the level of white and red blood cells.
  5. 7. pumps blood throughout your body.
Down
  1. 1. is 5 times your height.
  2. 3. Largest internal organ.
  3. 6. Voice box.