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Ear Anatomy

For BIO 201 Lab

TermDefinition
Auricle The visible portion of the ear that is outside of the head; directs sound waves to enter the ear
External Auditory Canal Canal that extends from the auricle to the tympanic membrane, directing sound waves to the tympanic membrane
Tympanic Membrane "Eardrum"; thin membrane that vibrates when sound hit it, transmitting vibrations from the external ear to the ear ossicles
Malleus "Hammer"; one of the ear ossicles, it receives vibrations from the tympanic membrane and transmits it to the incus
Incus "Anvil"; one of the ear ossicles, it receives vibrations from the malleus and transmits it to the stapes
Stapes "Stirrup"; one of the ear ossicles, it receives vibrations from the incus and transmits it to the inner ear
Eustachian Tube Tube in the middle ear that connects it to the nasopharynx; manages pressure differences between the atmosphere and the body
Tensor Tympani Muscle Muscle in the middle ear connected to the malleus that dampens sounds like chewing
Vestibule "Entrance Hall"; situated medial to eardrum with the cochlea behind it and the semicircular canals in front of it
Cochlea "Snail"; contains fluid with many small hair cells that are stimulated by vibrations and send electrical impulses to the brain
Semicircular Canals Three canals connected by the vestibule that help maintain balance
Vestibulocochlear Nerve Cranial Nerve 8; transmits sound and balance information from the inner ear to the brain
Created by: Rylyn27463
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