Respiratory System
Across
- 5. _____ cartilage is the largest layer of cartilage on the larynx
- 6. closes during swallowing to prevent food and liquids from entering the respiratory tract
- 8. contain a rich network of blood capillaries
- 11. branches off into the esophagus and trachea
Down
- 1. breathing
- 2. inspiration and expiration
- 3. allow air to be carried to both lungs
- 4. filter inhaled air to trap dust and pathogens
- 7. membrane that encloses each lung
- 9. voice box
- 10. divides the nose into 2 hollow spaces