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Allied Health

The ear

What is the outer ear? Pinna(Auricle), collects sound waves.
What is the external auditory canal? Ear canal.
What is cerumen? Earwax, protects the ear.
What is the tympanic membrane? Ear drum, seperates the outer and middle ear.
What is the middle ear? Cavity in temporal bone, connects with pharynx by eustachian tube. Bones in the middle ear transmit sound waves from ear drum to inner ear. Malleus(hammer), incus(anvil), stapes(stirrup)
What is the eustachian tube? Equalizes pressure in the middle ear with outside atmosphere
What is the inner ear? Contains spiral shaped organ of hearing-the cochlea, the cochlea contains a membranous tube, the cochlear duct.
What is the cochlear duct? Filled with fluid that vibrates when sound waves are transmitted by the stapes.
What is the organ of court? Delicate hairllike cells that pick up vibrations of fluid and transmit them as a sensory impulse along the auditory nerve to the brain.
What are semicircular canals? Three structures in the inner ear, contain liquid that is set in motion by head and body movements-impulses sent to cerebellum to help maintain body balance(equilibrium)
Pathway of hearing. Auditory canal, tympanic membrane, ossicles(malleus, incus, stapes), cochlea, auditory nerve, brain.
Created by: Netta16