Chapter 15
The Special Senses
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15
Pharyngotympanic
(auditory) tube
External
acoustic
meatus
Auricle
(pinna)
Auditory
ossicles
Entrance to mastoid
antrum in the
epitympanic recess
Tympanic membrane
Semicircular
canals
Cochlea
Cochlear
nerve
Vestibular
nerve
Oval window
(deep to stapes)
Round window
Incus
(anvil)
Malleus
(hammer)
Stapes
(stirrup)
(a) The three regions of the ear
(b) Middle and internal ear
Helix
Lobule
Vestibule
Pharyngotympanic
(auditory) tube
Tympanic
membrane
External ear
Middle
ear
Internal ear
(labyrinth)
Figure 15.24
Structure of the ear.
The inner ear structures in (b) appear as though they are
veiled because they are cavities within the temporal bone.
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