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middle ear |
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middle ear the sound-conducting part of the ear, containing the malleus, incus, and stapes middle ear [′mid·əl ′ir] (anatomy) The middle portion of the ear in higher vertebrates; in mammals it contains three ossicles and is separated from the external ear by the tympanic membrane and from the inner ear by the oval and round windows. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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With a 30 [degrees] otoscope, the middle ear cavity could be seen clearly through the perforation, and a close-up view showed most of its contents (figure, B). It seems to minimize static air pressure differences between the ear canal and middle ear cavity by the passive movement of the membrane toward the side of lower air pressure. In humans--and other mammals whose middle ear cavity is separated from the outside world by bone --sound usually strikes the eardrum from the outside only. |
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