ear anatomy Flashcards Preview

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Flashcards in ear anatomy Deck (18):
1

part of the ear Involved in hearing only

external ear

2

Structures of the external ear

pinna and external auditory canal

3

Narrow chamber in the temporal bone
Lined with skin

external auditory canal

4

Ceruminous (wax) glands are present

external auditory canal

5

Ends at the tympanic membrane

external auditory canal

6

Air-filled cavity within the temporal bone
Only involved in the sense of hearing

tympanic cavity

7

Bones of the Tympanic Cavity

Malleus (hammer)
Incus (anvil)
Stapes (stirrup)

8

These transfer sound to the inner ear

ossicles

9

Includes sense organs for hearing and balance
Filled with perilymph

Inner Ear or Bony Labyrinth

10

A maze of bony chambers within the temporal bone

Inner Ear or Bony Labyrinth

11

structures of the inner ear

Cochlea
Vestibule
Semicircular canals

12

Located within the cochlea
Receptors = hair cells on the basilar membrane

organ of corti

13

Receptor cells for equilibriumare in two structures

vestibule and semicircular canals

14

– receptors in the vestibule
Report on the position of the head
Send information via the vestibular nerve

maculae

15

(tiny stones) float in a gel around the hair cells

otoliths

16

hair cells of macule are embedded in

otolithic membrane

17

– receptors in the semicircular canals

Crista ampullaris

18

dynamic equilibrium
(gelatinous cap) covers the hair cells

cupula

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