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ear parts

pinna (pinnacle/auricle) The visible part of the outer ear. It collects sound and directs it into the outer ear canal.
outer ear canal The tube through which sound travels to the eardrum.
eardrum A thin membrane that vibrates when sound waves reach it.
hammer (malleus) A tiny bone that passes vibrations from the eardrum to the anvil.
anvil (incus) A tiny bone that passes vibrations from the hammer to the stirrup.
stirrup (stapes) A tiny, U-shaped bone that passes vibrations from the stirrup to the cochlea. This lithe smallest bone in the human body (it is 0.25 to 0.33cm long).
cochlea A spiral-shaped, fluid-filled inner ear structure; it is lined with cilia (tiny hairs) that move when vibrated and cause a nerve impulse to form.
nerves (auditory nerve) These carry electro-chemical signals from the inner ear (the cochlea) to the brain.
semicircular canals Three loops of fluid-filled tubes that are attached to the cochlea in the inner ear. They help us maintain our sense of balance.
Eustachian tube A tube that connects the middle ear to the back of the nose; it equalizes the pressure between the middle ear and the air outside.
Created by: erickaneves