Amaya Venters/Mrs.Key

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Across
  1. 2. any of the major air passages of the lungs that diverge from the windpipe
  2. 5. collection of organs whose primary function is to take in oxygen and expel carbon dioxide
  3. 7. any of the many tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place
Down
  1. 1. the part of the respiratory system that extends from the mouth to the larynx
  2. 3. the part of the respiratory system between the pharynx and the trachea
  3. 4. a tiny blood vessel that allows an exchange between blood and cells in tissue
  4. 6. thin-walled tubed that extends from the larynx to the bronchi
  5. 8. in biology, a vessel that carries blood to the heart