Respiratory System

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Across
  1. 2. takes place when we take oxygen into the lungs and push carbon dioxide out of the body.
  2. 4. pushing air out
Down
  1. 1. are the main organs of the respiratory system.
  2. 2. The trachea splits into two air tubes, called...
  3. 3. caused by allergies that inflame and narrow the airways.