The Respiratory system

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Across
  1. 2. Located in the throat between the nose and the voice box
  2. 3. Small air passages surrounded by blood vessel
  3. 5. Also known as the voice box
  4. 7. One of the primary organ involved in respiration.
Down
  1. 1. Small tube dividing into Alveoli
  2. 4. Gas inhaled by every human and is required for survival.
  3. 6. Entrance of air into your body and filters the air