Anatomy of the Ear

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Last updated 8:14 PM on 4/21/26
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9 Terms

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Outer ear.

• Auricle (pinna).

• Auditory canal

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Helix

Outer (cartilaginous) rim of the auricle

3
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Auditory canal

• Enters skull through external acoustic meatus (temporal bone)

• with guard hairs, cerumen.

4
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Middle Ear.

• Tympanic membrane (eardrum).

• Tympanic cavity of temporal bone.

• Auditory (eustachian) tube.

• Auditory ossicles: malleus, incus, stapes.

• Oval window.

• Muscles: stapedius, tensor tympani.

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Inner Ear.

  • Vestibule

  • cochlea

  • three semicircular canals

  • Bony labyrinth

  • Membranous labyrinth

  • Endolymph

  • Perilymph

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Bony labyrinth

maze in temporal bone

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Membranous labyrinth

tube within maze.

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Endolymph

fluid in membranous labyrinth.

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Perilymph

fluid between membranous labyrinth and bone.