Sunday, August 15, 2004

Ear, Human, Middle-ear cavity

The cavity of the middle ear is a narrow, air-filled space. A slight constriction divides it into an upper and a lower chamber, the tympanum (tympanic cavity) proper below and the epitympanum above. These chambers also are referred to as the atrium and attic, respectively. The middle-ear space roughly resembles a rectangular room with four walls, a floor, and a ceiling. The

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