Respiratory System

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Across
  1. 3. passageway of air into either lung
  2. 4. organ where gas exchange occurs with the circulatory system
  3. 5. pushing air out of the body
  4. 7. gas that enters the body and blood stream and is taken to every cell in the body
  5. 8. tiny air sacs that are covered in capillaries
  6. 9. muscle that controls inhaling and exhaling
Down
  1. 1. small passageways of air that branch out all over lung
  2. 2. taking air into the body
  3. 6. passageway of air from nasal cavity into bronchi