Respiratory System

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Across
  1. 1. The interior of the nose consists of the
  2. 5. Part of the mucous membrane of the larynx
  3. 6. the only externally visible part of the respiratory system
  4. 7. Each lung is _______ into lobes by fissure
Down
  1. 2. which protrudes anteriorly and is commonly called Adam’s apple
  2. 3. guardian of the airways
  3. 4. slitlike passageway between the vocal folds is the