Respiratory System Cross Word.

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Across
  1. 3. The muscles that moves when you breath in and out
  2. 6. The gas you breath out
  3. 8. Helps to make your lungs strong and healthy
  4. 9. What does your Respiratory system control?
Down
  1. 1. Where oxygen and carbon dioxide are exchanged into the blood.
  2. 2. How many lunch do you have?
  3. 4. Another name for your wind pipe.
  4. 5. The main organs of the Respiratory System
  5. 7. What you breath in when you breath in air