Respiratory system Fernanda Flores.

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Across
  1. 4. Is and essential process for the body.
  2. 5. passage The entrance of the
Down
  1. 1. Is transported in the blood to all the cells.
  2. 2. system Is automatic and involuntary.
  3. 3. dioxide Is eliminated from the body by exhalation
  4. 6. The gas exchange happens there.