How is the ear canal constructed? The external ear canal is a canal about 4 cm long that connects the pinna and the eardrum, which seals off the following parts of the ear It is in the external auditory canal that earwax, a viscous substance that protects the ear from dust, germs and drying out. Hit 👍🏼 if you're interested in seeing this kind of information on the channel Put 👎🏼 if you're not interested