Circulatory

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Across
  1. 3. travels the air to other parts of body
  2. 5. type of gas
  3. 8. broduced from the body
  4. 9. big and small
Down
  1. 1. a small button
  2. 2. needed to breathe
  3. 4. where air travels through
  4. 6. not used
  5. 7. everywhere in the air
  6. 10. state of water