Under the skin the outer one third of the canal is cartilage and inner two thirds is bone. The ear drum is about the size of a dime and is the same size in the new born baby as in the adult. The medical term for the ear drum is the tympanic membrane. The ear drum is a transparent gray membrane.

The ear is made up of three parts: the outer, middle, and inner ear. All three parts of the ear are important for detecting sound by working together to move sound from the outer part through the middle and into the inner part of the ear. Ears also help to maintain balance.

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