The Respiratory System

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Across
  1. 3. absorbs oxygen
  2. 5. passages leading into lungs
  3. 7. sponge-like organs
  4. 8. the windpipe
Down
  1. 1. main part bringing in air
  2. 2. muscle that expands lungs
  3. 4. connects the nose to the larynx
  4. 6. contains vocal cords