Related Clues:
- Ventilation shaft
- Windpipe, for one
- Plane's route
- Plane's path
- Ventilation passage
- Freshen passage in ventilation shaft
- Route to the lungs
- It puts the ''high'' in highway
- Passage to the lungs
- Route used by planes
- Vent; flight route
- Breathing passage
- Female abandons part of course, needing breathing space
- Route for planes
- Section of course giving up initial passage for inspiration