Across
- 1. network of branching pathways in the respiratory system
- 3. zone outside of the respiratory zone
- 5. windpipe, has C-shaped cartilage to help keep it open
- 6. terminal bronchioles lead into this zone
Down
- 2. projections from lateral walls of nose that increase surface area
- 4. respiratory tract that includes the nose
- 5. vocal cords that vibrate with expelled air and allow us to speak