Respiratory System

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Across
  1. 1. filtering out dust and other particles that enter the nose with the breathed air.
  2. 3. two air tubes that branch off of the trachea and carry air directly into the lungs.
  3. 5. filters the air we breathe and branches into the bronchi
  4. 6. They are tiny, multi-lobed air sacs made of simple squamous cells
  5. 9. It is a flap of tissue that seals off the opening of the trachea during the process of swallowing
  6. 10. It leads from the oral and nasal cavities in the head to the esophagus
Down
  1. 2. a disease of the respiratory system
  2. 4. commonly known as the “voice box.”
  3. 7. dome-shaped muscle at the bottom of the lungs called the
  4. 8. Air enters through the