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Anat final > special senses: ear > Flashcards

special senses: ear Flashcards

1
Q

parts

A 
external ear
middle ear
inner ear
cochlea 
receptors in inner ear
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2
Q

external ear

A

conducts sound

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3
Q

external ear parts

A 
auricle (pinna)
external auditory (acoustic) canal (meatus)
tympanic membrane (eardrum)
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4
Q

auricle (pinna)

A

elastic cartilage, covered with skin

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5
Q

middle ear

A

conducts sound

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6
Q

middle ear parts

A

Eustachian tube

ear ossicles

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7
Q

eustachian tube

A

also called pharyngotympanic tube

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8
Q

ear ossicles

A

malleus
incus
stapes

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9
Q

malleus

A

secured to tympanic membrane

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10
Q

stapes

A

transmits sound to inner ear by oval window

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11
Q

inner ear

A

aka labyrinth

-detects sound, involved with equilibrium

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12
Q

inner ear (labyrinth) parts:

A

bony labyrinth

membranous labyrinth

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13
Q

bony labyrinth

A

tunnels in temporal bone

contains perilymph

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14
Q

bony labyrinth parts

A

semicircular canals (equilibrium)
vestibule (equilibrium)
cochlea (hearing)

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15
Q

membranous labyrinth

A

surrounded and protected by bony labyrinth

contains endolymph

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16
Q

membranous labyrinth parts

A 
semicircular ducts (inside canals)
utricle and saccule (inside vestibule)
cochlear duct (inside cochlea)
17
Q

cochlea

A

coiled

-each coil has three channels

18
Q

cochlea channels

A
  • scala vestibuli (upper, perilymph)
  • scala tympani (lower, perilymph)
  • cochlear duct (middle, endolymph)
19
Q

cochlea membranes

A

vestibular membrane
basilar membrane
tectorial membrane

20
Q

vestibular membrane

A

-b/w cochlear duct and scala vestibuli

21
Q

basilar membrane

A

-b/w cochlear duct and scala tympani

22
Q

tectorial membrane

A

covers hair cells (=receptor cells)

23
Q

receptors in inner ear

A
  • hair cell that synapses with an associated neuron
  • send impulses t obrain by crfanial nerve VIII
  • hairs =cilia tat extend into endolymph
  • tips of cilia embedded in tectorial membrane (stability)

Anat final (13 decks)

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