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Sigma KEE - AuditoryCanal
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AuditoryCanal
The ear canal (external acoustic meatus, external auditory meatus, EAM) is a pathway running from the outer ear to the middle ear. The adult human ear canal extends from the pinna to the eardrum and is about 2.5 centimetres (1 in) in length and 0.7 centimetres (0.3 in) in diameter.[from Wikipedia]
Relationships      
Parents 体腔 Any BodyPart which contains an unfilled space, e.g. BodyVessels, the atria and ventricles of the heart, the lungs, etc.


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