Ch. 11 Anatomic Terms Flashcards Preview

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Flashcards in Ch. 11 Anatomic Terms Deck (20):
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external ear

outer structures of the ear

1

pinna

auricle (little ear); projected part of the external ear (pinna = ear)

2

external auditory meatus or canal

ear canal

3

cerumen

a waxy substance secreted by glands located throughout the external canal

4

middle ear

structures in the middle of the ear that vibrate sound from the tympanic membrane to the inner ear

5

tympanic membrane (TM)

eardrum

6

malleus

hammer; first of three auditory ossicles of the middle ear

7

incus

anvil; middle of three auditory ossicles of the middle ear

8

stapes

stirrup; last of three auditory ossicles of the middle ear

9

Eustachian tube; auditory tube

tube connecting the middle ear to the pharynx

10

oval window

membrane that covers the opening between the middle ear and inner ear

11

inner ear; labyrinth

intricate, fluid-filled, inter-communicating bony and membranous passages that relay sound waves to auditory nerve fibers; also responsible for balance and equilibrium (labyrinth = maze)

12

cochlea

coiled tubular structure of the inner ear that contains the organ of Corti (cochlea = snail)

13

perilymph

fluid that fills the bony labyrinth of the inner ear

14

endolymph

fluid within the membranous labyrinth of the inner ear

15

organ of Corti

structure located in the cochlea; contains receptors that receive vibrations and generate nerve impulses for hearing

16

vestibule

middle part of the inner ear, in front of the semicircular canals and behind the cochlea, that contains the utricle and the saccule; functions to provide body balance and equilibrium

17

utricle

the larger of the two sacs within the membranous labyrinth of the vestibule in the inner ear (uter = leather bag)

18

saccule

the smaller of the two sacs within the membranous labyrinth of the vestibule in the inner ear (sacculus = small bag)

19

semicircular canals

three canals within the inner ear that contain specialized receptor cells that generate nerve impulses with body movement

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