Chapter 25: Special Senses: Hearing & Equilibrium Flashcards


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1

Auricle (Pinna)
(External Ear)

Skin covered cartilaginous structure surrounding the auditory canal.

2

Lobule
(External Ear)

Ear lobe

3

External Acoustic Meatus (Auditory Canal)
(External Ear)

Short narrow chamber carved into the temporal bone

4

Tympanic Membrane
(Middle Ear)

Eardrum

5

Ossicles
(Middle Ear)

The three tiny bones serving as transmitters of vibrations and located within the middle ear: the malleus, incus, and stapes.

6

Malleus (Hammer)
(Middle Ear)

Outter bone of the ossicles in middle ear.

7

Incus (Anvil)
(Middle Ear)

Middle bone of the ossicles in middle ear.

8

Stapes (Stirrup)
(Middle Ear)

Inner bone of the ossicles in middle ear.

9

Oval Window
(Middle Ear)

A membrane-covered opening which leads from the middle ear to the vestibule of the inner ear.

10

Pharyngotympanic tube (Auditory Tube)
(Middle Ear)

Tube that connects the middle ear and the pharynx. Also called auditory tube, eustachian tube

11

Osseous (Bony Labyrinth)
(Inner Ear)

rigid outer wall of the inner ear. It consists of three parts: the vestibule, semicircular canals, and cochlea.

12

Perilymph
(Inner Ear)

Extracellular fluid located within the cochlea (part of the ear) in two of its three compartments: the scala tympani and scala vestibuli.

13

Membranous Labyrinth
(Inner Ear)

Lodged within the bony labyrinth and has the same general form; it is, however, considerably smaller and is partly separated from the bony walls by a quantity of fluid, the perilymph.

14

Endolymph
(Inner Ear)

Fluid contained in the membranous labyrinth of the inner ear.

15

Vestibule

An enlarged area at the beginning of a canal of the inner ear.
Helps with equilibrium and balance

16

Semicircular Canals

Three fluid-filled bony channels in the inner ear. They are situated at right angles to each other and provide information about orientation to the brain to help maintain balance.

17

Cochlea

Snail-shaped chamber of the bony labyrinth that houses the receptor for hearing [the spiral organ (of Corti)].

18

Cochlear Duct

Endolymph filled cavity inside the cochlea, located in between the scala tympani and the scala vestibuli, separated by the basilar membrane.

19

Scala Vestibuli

The upper bony passage of the cochlea.

20

Scala Tympani

The lower bony passage of the cochlea

21

Spiral Organ of Corti

The organ of Corti (or spiral organ) is the organ in the inner ear of mammals that contains auditory sensory cells, or "hair cells."

22

Hair Cells

The sensory receptors of both the auditory system and the vestibular system in all vertebrates

23

Cochlear Nerve (Auditory or acoustic nerve)

A nerve in the head that carries signals from the cochlea of the inner ear to the brain.

24

Basilar Membrane

A membrane in the cochlea that bears the organ of Corti.

25

Tectorial Membrane

A gelatinous membrane positioned over the hair cells of the spiral organ in the cochlea.

26

Vestibular Membrane

A membrane inside the cochlea of the inner ear. It separates scala media from scala vestibuli.

27
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What is A?

External Ear

28
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What is B?

Auricle (Pinna)

29
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What is C?

Lobule

30
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What is D?

External Acoustic Meatus

31
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What is E?

Middle Ear

32
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What is F?

Stapes

33
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What is G?

Incus

34
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What is H?

Malleus

35
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What is I?

Tympanic Membrane

36
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What is J?

Pharyngotympanic (auditory) Tube

37
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What is K?

Auditory Nerve

38
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What is L?

Facial Nerve

39
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What is M?

Vestibular Nerve

40
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What is N?

Inner Ear

41
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What is O?

Cochlea

42
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What is P?

Semicircular Canals