Respiratory System Crossword

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Across
  1. 4. – The muscle that contracts and flattens to allow inhalation.
  2. 6. – The flap that covers the trachea during swallowing.
Down
  1. 1. – The main organ for gas exchange.
  2. 2. – The voice box is where the vocal cords are located.
  3. 3. – The tube that connects the throat to the lungs (singular form of bronchi).
  4. 5. – The windpipe.