Respiratory System

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Across
  1. 4. where air enters the body
  2. 7. air flows down to the lungs, also called the windpipe
  3. 10. the exchange of gases between the body and air
Down
  1. 1. organs that fill with air
  2. 2. dioxide a gas the body gives off as waste
  3. 3. muscle below the lungs that contracts and relaxes
  4. 5. colorless, odorless gas necessary for almost all life
  5. 6. air travels through down to the voice box
  6. 8. allows people to speak. Attached to the trachea
  7. 9. produces mucus to trap dirt and dust