Ch. 11 Anatomic Terms

Question 0

pinna

Answer 0

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

Question 1

external ear

Answer 1

outer structures of the ear

Question 2

external auditory meatus or canal

Answer 2

ear canal

Question 3

cerumen

Answer 3

a waxy substance secreted by glands located throughout the external canal

Question 4

middle ear

Answer 4

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

Question 5

tympanic membrane (TM)

Answer 5

eardrum

Question 6

malleus

Answer 6

hammer; first of three auditory ossicles of the middle ear

Question 7

incus

Answer 7

anvil; middle of three auditory ossicles of the middle ear

Question 8

stapes

Answer 8

stirrup; last of three auditory ossicles of the middle ear

Question 9

Eustachian tube; auditory tube

Answer 9

tube connecting the middle ear to the pharynx

Question 10

oval window

Answer 10

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

Question 11

inner ear; labyrinth

Answer 11

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)

Question 12

cochlea

Answer 12

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

Question 13

perilymph

Answer 13

fluid that fills the bony labyrinth of the inner ear

Question 14

endolymph

Answer 14

fluid within the membranous labyrinth of the inner ear

Question 15

organ of Corti

Answer 15

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

Question 16

vestibule

Answer 16

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

Question 17

utricle

Answer 17

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

Question 18

saccule

Answer 18

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

Question 19

semicircular canals

Answer 19

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