The ear canal (external auditory meatus, external acoustic meatus) (meatus acusticus externus) , is a tube running from the outer ear to the middle ear. The adult human ear canal extends from the pinna to the eardrum and is about 35 mm in length and 5 to 10 mm in diameter [Wikipedia: http://en.wikipedia.org/wiki/Ear_canal].
Hierarchy: 4
Parent: external ear
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