weng

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Across
  1. 2. / A tube that leads to the lungs.
  2. 3. / Prevents the entry of food to the trachea that leads to the lung
  3. 6. / A gas that you breath out. it is a waste.
Down
  1. 1. / Inhale and exhale
  2. 4. / Main organ of respiratory system
  3. 5. / Breath out.
  4. 7. / What we breath