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Anatomy: Eye > Ear > Flashcards

Ear Flashcards

1
Q

Pinna

A

Soft cartilaginous outer portion of the ear

  • Allows sounds to be collected
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2
Q

Acoustic Meatus

A
  • The canal of the ear that carries the sound waves to the eardrum
  • Lined with hair
  • Covered with cerumen
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3
Q

Cerumen

A
  • A waxy substance that traps dust particles

- Lines the acoustic meatus

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4
Q

Tympanic Membrane (Eardrum)

A
  • A resistant elastic membrane at the end of the acoustic meatus
  • Vibrates when it receives sound waves from the canal, and then transmits the waves to the ossicles
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5
Q

Tympanic Cavity

A
  • A small cavity surrounding the bones of the middle ear
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6
Q

Malleus

A
  • Hammer-shaped ossicle/bone in the middle ear

- Connected to eardrum, and lateral to the incus bone

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7
Q

Incus

A
  • Anvil-shaped small ossicle/bone in middle ear

- Connects the malleus bone to the stapes bone

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8
Q

Stapes

A
  • Stirrup-shaped small ossicle/bone in the middle ear

- It is the smallest and lightest bone in the human body

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9
Q

Semicircular Canals

A
  • Three interconnected tubes

- Located inside each ear

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10
Q

Vestibule

A
  • A bony structure into which the three semicircular canals opens into
  • With these canals, it is responsible for equilibrium
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11
Q

Cochlea

A
  • Bony structure intended for hearing
  • Part of the inner ear
  • It receives vibrations from the ossicles, and transforms them into nervous impulses before transmitting them to the brain
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12
Q

Vestibular Nerve

A
  • Nerve transmitting messages related to equilibrium to the brain
  • Emanates from both the vestibule and semicircular canals
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13
Q

The Ear

A
  • the organ of hearing and equilibrium

- Organized into the External, Middle, and Inner Ears

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14
Q

Auricle

A
  • A visual outer portion of the ear enabling sounds to be collected
  • Consists of : The auricle, external acoustic meatus, and the tympanic membrane
  • Leads into the middle ear
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15
Q

Auditory (Eustachisan) Tube

A
  • Tube connecting the middle ear to the nasopharynx

- Equalizes air pressure on both sides of the eardrum

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16
Q

Cochlear Nerve

A
  • Transmits auditory messages collected in the cochlea to the brain
  • Joins with the vestibular nerves to form the auditory nerve
  • Extends to the brainstem, where its fibers make contact with the cochlear nucleus
17
Q

The Internal Ear

A
  • Liquid-filled cavity hollowed out of the temporal bone

- Transforms sound vibrations into nerve influxes to be interpreted by the brain

18
Q

The Middle Ear

A
  • Air-filled cavity hollowed out of the temporal bone

- Receives sound from the external ear, amplifies them, and transmits them to the internal ear

19
Q

The External Ear

A
  • The visible portion of the ear

- Enables sounds to be collected and directed to the middle ear through the acoustic meatus

Anatomy: Eye (8 decks)

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