Respiratory system organs

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Across
  1. 2. Passage connecting your throat and lungs.
  2. 5. From your lungs, your bloodstream delivers _______ to all your organs and other tissues
  3. 6. Small branches of the bronchial tubes that lead to the alveoli.
  4. 7. Commonly called the voice box, is an organ in the top of the neck involved in breathing, producing sound and protecting the trachea against food aspiration.
Down
  1. 1. Openings that pull air from outside your body into your respiratory system.
  2. 3. Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.
  3. 4. Tube that delivers air from your mouth and nose to the trachea (windpipe).
  4. 7. Two organs that remove oxygen from the air and pass it into your blood