In what ways is the Eustachian tube different from the external auditory canal?
external auditory canal is typically closed and Eustachian tube is always open, external
auditory canal is made of cartilage and Eustachian tube is made of bone, external auditory
canal is lined with cerumen and Eustachian tube is lined with mucus
external auditory canal is always open and Eustachian tube is typically closed, external
auditory canal is lined with cerumen and Eustachian tube is lined with mucus, external
auditory canal does not open and close and Eustachian tube has muscles that allow it to open
external auditory canal is air-filled and Eustachian tube is fluid-filled, external auditory canal
does not open and close and Eustachian tube has muscles that allow it to open, external
auditory canal leads to middle ear and Eustachian tube leads to inner ear
external auditory canal leads to middle ear and Eustachian tube leads to inner ear, external
auditory canal has bony portion closest to middle ear and Eustachian tube has bony portion
closest to inner ear, external auditory canal is lined with mucus and Eustachian tube is lined
with cerumen