Human respiratory system

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Across
  1. 3. cavities Have nasal conchae.
  2. 5. Stay away from the end of the nasal cavities.
  3. 6. Is the position where gas is exchanged between the air and the blood.
Down
  1. 1. An open hole on the outside of the airway.
  2. 2. Is a pipe of air passage from the nose into the nostril.
  3. 4. Is the main structure of the respiratory system.