As it vibrates, it sends out our pressure wave that eventually vibrates our round window, also found in this region right below our oval window. Now, these pressure variations in the fluid cause the hair cells to depolarize, and the action potential travels through the cochlear nerve and up to our brain. So let's suppose these are the hair cells that are found inside the organ of corte found inside the cochlea. And as the pressure waves hit these hair cells, the Microville, these extensions, hair like extensions, basically vibrate and they cause the depolarization of the cell membrane and that initiates an action potential which then travels through these exons, through our cochlear nerve and eventually into the brain. Now, the last thing I want to talk about is something called the semicircular canals. So inside the person, inside each ear, we basically have three semicircular canals.