ear structures/gross anatomy

1 — general section of ear

outer ear

2 — general section of ear

middle ear

3 — general section of ear

inner ear

4

auricle

5

tympanic membrane

6

auditory canal

7

lobule

8

stapes

9

incus

10

malleus

11

semicircular ducts

12

oval window

13

vestibular nerve

14

cochlear nerve

15

vestibule

16

cochlea

17

round window

18

auditory (pharyngotympanic?) tube

1

tectorial membrane

2

basilar membrane

3

hair cells

4

afferent fibers of cochlear nerve

5

vestibular membrane

6

cochlear duct

7

tectorial membrane

8

spiral organ

9

basilar membrane

10

scala vestibuli

11

scala tympani

cochlea function

contains organs that transforms sound waves into actions potentials

cochlear nerve function

transmit auditory information to brain

round window function

decompresses acoustic energy that enters cochlea

semicircular canals function

detect rotational head movement/angular acceleration

spiral organ function

receptor for hearing/transforms sound waves to electrical impulses

vestibular nerve function

transmit equilibrium information to brain

vestibule function

detects head movement (linear acceleration and static equilibrium)

1

semicircular canals

2

semicircular ducts

3

cochlear nerve

4

cochlea

5

vestibule

6

cochlear duct

7

ampullae

what labyrinth type is the pink?

membranous labyrinth

what labyrinth type is the tan?

bony labyrinth

1

stapes

structure stapes/1 is touching

oval window

2

round window

where is external acoustic meatus?

in auditory canal/hole behind ramus of mandible