Across
- 4. carries air from the throat to the lungs
- 6. the part of the throat situated below the mouth and nasal cavity
- 7. separates the thoracic cavity from the abdominal cavity
- 8. unites in the lungs that permit gas exchange between air in the lungs and the blood in the capillaries
- 9. narrow tubes made of elastic fibers and smooth muscle tissue
- 10. hair-like projections found in the epithelium of the nose
- 12. slippery secretion produced by the mucus membranes
Down
- 1. the division of the trachea from the left and right lung
- 2. a flap attached to the larynx
- 3. the part of the respiratory system that holds the vocal cords
- 5. a series of organs which take in oxygen and give off carbon dioxide
- 11. a pair of organs optimized for gas exchange between our blood and air