RESPIRATORY SYSTEM CROSSWORD

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Across
  1. 3. You find the vocal chords here
  2. 4. Muscle that separates the thorax from the abdomen needed for breathing
  3. 6. Necessary component of the air for respiration
  4. 7. Release air from the nose or mouth
Down
  1. 1. The membrane that covers the lungs
  2. 2. These branches make the bifurcation of the end of the trachea
  3. 5. The exchange of gases between air and blood happens in these