They are. http://en.wikipedia.org/wiki/Eustachian_tube http://en.wikipedia.org/wiki/Eustachian_tube It helps with drainage if you get an ear infection, and tha

They are. http://en.wikipedia.org/wiki/Eustachian_tube http://en.wikipedia.org/wiki/Eustachian_tube It helps with drainage if you get an ear infection, and that kind of thing.