Body Systems Crossword puzzle

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Across
  1. 3. this system provides protection for internal organs
  2. 5. the color of oxygenated blood
  3. 6. this system is responsible for taking in oxygen and releasing carbon dioxide
  4. 7. only muscle that is specific to the heart
  5. 8. the digestive system consists of the mouth, stomach, and the ________
  6. 11. this system is responsible for the production and secretion of hormones for regulation of body growth
  7. 12. good for nothing system that attacks the healthy cells in the body
Down
  1. 1. this organ is responsible for storing urine
  2. 2. this system is responsible for producing offspring
  3. 4. this system acts like a barrier to protect the body from the outside world
  4. 9. there are a total of 206 of these that are a part of the skeletal system
  5. 10. an involuntary movement; related to the nervous system