MT CH 13 Anatomical Terms (EAR)

Question 1

EXTERNAL EAR:

pinna

Answer 1

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

Question 2

EXTERNAL EAR:

external auditory meatus (canal)

Answer 2

external passage for sounds collected from the pinna to the tympanum (meat/o = opening)

Question 3

EXTERNAL EAR:

cerumen

Answer 3

waxy substance secreted by glands located throughout the external canal

Question 4

MIDDLE EAR:
tympanic membrane (TM)

Answer 4

eardrum; drum-like structure that receives sound collected in the external auditory meatus (canal) and amplifies it through the middle ear

Question 5

MIDDLE EAR:

malleus

Answer 5

hammer; first of the three auditory ossicles of the middle ear

Question 6

MIDDLE EAR:

incus

Answer 6

anvil; middle of the three auditory ossicles of the middle ear

Question 7

MIDDLE EAR:

stapes

Answer 7

stirrup; last of the three auditory ossicles of the middle ear

Question 8

eustachian tube or auditory tube

Answer 8

tube connecting the middle ear to the pharynx (throat)

Question 9

mastoid process

Answer 9

projection of the temporal bone located behind the ear containing air cells that connect to the middle ear (masto = breast)

Question 10

oval window

Answer 10

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

Question 11

INNER EAR:

Answer 11

structures and liquids that relay sound waves to the auditory nerve fibers on a path to the brain for interpretation of sound

Question 12

INNER EAR:

labyrinth

Answer 12

maze; inner ear consisting of bony and membranous labyrinths

Question 13

INNER EAR:

cochlea

Answer 13

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

Question 14

INNER EAR:

perilymph

Answer 14

fluid that fills the bony labyrinth of the ear

Question 15

INNER EAR:

endolymph

Answer 15

fluid within the cochlear duct of the inner ear (labyrinth)

Question 16

INNER EAR:

organ of Corti

Answer 16

organ located in the cochlea that contain receptors (hair cells) that receive vibrations and generate nerve impulses for hearing

Question 17

INNER EAR:

vestibule

Answer 17

middle part of the inner ear in front of the semicircular canals and behind the cochlea that contain the utricle and saccule

Question 18

INNER EAR:

utricle

Answer 18

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

Question 19

INNER EAR:

saccule

Answer 19

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

Question 20

INNER EAR:

semicircular canals

Answer 20

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