human anatomy

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Across
  1. 1. they cover the surface of your body
  2. 5. the main support structure of your body, especially the upper body and back
  3. 6. it pumps blood throughout the body
  4. 8. it houses the brain
  5. 11. they come in pairs and produce urine
  6. 12. they produce red blood cells
Down
  1. 2. they digest and absorb nutrients
  2. 3. they make up the skeletal system
  3. 4. the center of the nervous system
  4. 7. it stores urine
  5. 9. we use it to breathe
  6. 10. it works hard when you smoke or drink alcohol