Respiratory System Crossword Pd 6

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Across
  1. 2. literally breathing
  2. 4. when air sacs fill with fluid
  3. 6. what holds the vocal chords
Down
  1. 1. What let’s you breath
  2. 2. cage protecting the lungs and organs
  3. 3. end of the respiratory system
  4. 5. a poisonous gas that only makes up 21% air