The Respiratory System

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Across
  1. 1. A pipe that sends air to the lungs
  2. 4. It is found at the end of the trachea and splits the air into each lung
  3. 5. the muscle that is responsible for inflating and deflating the lungs
Down
  1. 2. air sacs that exchange oxygen and carbon dioxide in the blood
  2. 3. an organ that collects the air
  3. 4. small air tubes that connect the the bronchus to the alveoli