<P> Hair cells are the sensory receptors of both the auditory system and the vestibular system in the ears of all vertebrates . Through mechanotransduction , hair cells detect movement in their environment . In mammals , the auditory hair cells are located within the spiral organ of Corti on the thin basilar membrane in the cochlea of the inner ear . They derive their name from the tufts of stereocilia called hair bundles that protrude from the apical surface of the cell into the fluid - filled cochlear duct . Mammalian cochlear hair cells are of two anatomically and functionally distinct types , known as outer , and inner hair cells . Damage to these hair cells results in decreased hearing sensitivity , and because the inner ear hair cells can not regenerate , this damage is permanent . However , other organisms , such as the frequently studied zebrafish , and birds have hair cells that can regenerate . The human cochlea contains on the order of 3,500 inner hair cells and 12,000 outer hair cells at birth . </P>
<P> Hair cells are the sensory receptors of both the auditory system and the vestibular system in the ears of all vertebrates . Through mechanotransduction , hair cells detect movement in their environment . In mammals , the auditory hair cells are located within the spiral organ of Corti on the thin basilar membrane in the cochlea of the inner ear . They derive their name from the tufts of stereocilia called hair bundles that protrude from the apical surface of the cell into the fluid - filled cochlear duct . Mammalian cochlear hair cells are of two anatomically and functionally distinct types , known as outer , and inner hair cells . Damage to these hair cells results in decreased hearing sensitivity , and because the inner ear hair cells can not regenerate , this damage is permanent . However , other organisms , such as the frequently studied zebrafish , and birds have hair cells that can regenerate . The human cochlea contains on the order of 3,500 inner hair cells and 12,000 outer hair cells at birth . </P>
where are the auditory receptors known as hair cells
where are the auditory receptors known as hair cells
in the ears of all vertebrates
in the ears of all vertebrates