Across
- 5. Typifies the conducting system
- 7. Held open by bone and cartilage
- 8. Similar to the trachea, but branching into the lungs
- 9. Located at the point where the respiratory and digestive tracts separate
Down
- 1. Allows gas exchange
- 2. Functional unit of the lung where gaseous exchange takes place
- 3. Part of the digestive system situated posterior to the nasal and oral cavities and posterior to the larynx
- 4. Essential respiration organ in many air-breathing living things
- 6. Air in to and out of lungs