Respiratory System

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Across
  1. 4. A long tube in the neck and chest that helps carry air in and out of the lungs, aka the windpipe
  2. 6. Either of the two main branches of the trachea that are the main passageway into the lungs
  3. 7. Air sacs where the primary gas exchange occurs
  4. 9. Breathing in
  5. 11. A slimy substance that is secreted to moisten and warm the air in the respiratory system
  6. 13. Breathing out
Down
  1. 1. A hollow muscular organ that houses the vocal cords
  2. 2. Primary muscle of respiration
  3. 3. Allows air to move from the nose and mouth to the larynx, aka the throat
  4. 5. Structures projecting from a cell that move fluids over the cell surface
  5. 8. The primary organs of respiration
  6. 10. Bronchospasms that cause breathing difficulties in some
  7. 12. The flap over the trachea that keeps food from entering the windpipe