Tympanic membrane (eardrum): The eardrum, a thin membrane that serves as a partition between the external ear and the middle ear and transmits the motion of sound waves to the chain of bones in the middle ear.
Tympanic membrane (eardrum): The eardrum, a thin membrane that serves as a partition between the external ear and the middle ear and transmits the motion of sound waves to the chain of bones in the middle ear.
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