MT CH 13 Anatomical Terms (EAR) Flashcards
EXTERNAL EAR:
pinna
auricle (little ear); projected part of the external ear (pinna = feather)
EXTERNAL EAR:
external auditory meatus (canal)
external passage for sounds collected from the pinna to the tympanum (meat/o = opening)
EXTERNAL EAR:
cerumen
waxy substance secreted by glands located throughout the external canal
MIDDLE EAR: tympanic membrane (TM)
eardrum; drum-like structure that receives sound collected in the external auditory meatus (canal) and amplifies it through the middle ear
MIDDLE EAR:
malleus
hammer; first of the three auditory ossicles of the middle ear
MIDDLE EAR:
incus
anvil; middle of the three auditory ossicles of the middle ear
MIDDLE EAR:
stapes
stirrup; last of the three auditory ossicles of the middle ear
eustachian tube or auditory tube
tube connecting the middle ear to the pharynx (throat)
mastoid process
projection of the temporal bone located behind the ear containing air cells that connect to the middle ear (masto = breast)
oval window
membrane that covers the opening between the middle ear and inner ear
INNER EAR:
structures and liquids that relay sound waves to the auditory nerve fibers on a path to the brain for interpretation of sound
INNER EAR:
labyrinth
maze; inner ear consisting of bony and membranous labyrinths
INNER EAR:
cochlea
coiled tubular structure of the inner ear that contains the organ of Corti (cochlea = snail)
INNER EAR:
perilymph
fluid that fills the bony labyrinth of the ear
INNER EAR:
endolymph
fluid within the cochlear duct of the inner ear (labyrinth)
INNER EAR:
organ of Corti
organ located in the cochlea that contain receptors (hair cells) that receive vibrations and generate nerve impulses for hearing
INNER EAR:
vestibule
middle part of the inner ear in front of the semicircular canals and behind the cochlea that contain the utricle and saccule
INNER EAR:
utricle
larger of the two sacs within the membranous labyrinth of the vestibule in the inner ear (uter = leather bag)
INNER EAR:
saccule
smaller of the two sacs within the membranous labyrinth of the vestibule in the inner ear (sacculus = small bag)
INNER EAR:
semicircular canals
three canals within the inner ear that contain specialized receptor cells that generate nerve impulses with body movement