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