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human ear

definitions and descriptions

QuestionAnswer
External Ear Involved in hearing only
pinna outer ear
meatus opening or canal
middle ear the chamber between the eardrum and cochlea containing three tiny bones (hammer, anvil, and stirrup) that concentrate the vibrations of the eardrum on the cochlea's oval window
eustachian tube A narrow tube between the middle ear and the throat that serves to equalize pressure on both sides of the eardrum
Ossicles malleus, incus, stapes
Malleus Receives vibration from eardrum; movement stimulates incus
incus Movement stimulates stapes
stapes Movement stimulates receptors in cochlea to hear sound
inner ear the innermost part of the ear, containing the cochlea, semicircular canals, and vestibular sacs
cochlea contains receptors for hearing
vestibule contain receptors for gravity and linear acceleration
Semicircular canals receptors sense rotational motion
Motion Sickness Nausea and weakness caused by continuous stimulation of semicircular canals
Created by: rufus webster
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