- oval window – connects the middle ear with the inner ear
- semicircular ducts – filled with fluid; attached to cochlea and nerves; send information on balance and head position to the brain
- cochlea – spiral-shaped organ of hearing; transforms sound into signals that get sent to the brain
- auditory tube – drains fluid from the middle ear into the throat behind the nose
When the stapes moves, it pushes the oval window, which then moves the cochlea. The cochlea takes the fluid vibration of sounds from the surrounding semi-circular ducts and translates them into signals that are sent to the brain by nerves like the vestibular nerve and cochlear nerve.