Respiratory System

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Across
  1. 3. organ that is used to breathe
  2. 4. sound made
  3. 6. sacs where oxygen is exchanged
  4. 7. long-acting beta agonist
Down
  1. 1. infectious respiratory disease that is a major cause of death
  2. 2. most common chronic respiratory disease
  3. 5. two airways that lead to the lungs