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1- Pinna (Auricle)

2- External auditory
meatus (auditory canal)
3-Tympanic membrane
(eardrum)
4- Malleus
5- Incus
6- Stapes
7- Oval window
8- Estachian tube
9- Cochlea
10- Auditory nerve fibers
11- Vestibule
12- Semicircular canals
Pathway of sound
vibrations from the
outer ear to the brain
(A)Healthy tympanic
membrane.
(B) Tympanic membrane with
cholesteatoma.
(C) Tympanic membrane with
acute otitis media
Light

head
Magnifying lens

On/Off switch

Handle

(A) Correct technique for otoscopy.
(B) An otoscope with a pneumatic device for pneumatic otoscopy.

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The ear