The inner ear is located inside the auditory capsule or shrutikotar of the crown. Its main part is the membranous labyrinth. It is covered by bony labyrinth. The membranous labyrinth is filled with endolymph and the bony labyrinth with perilymph. The inner ear consists of two chambers. The human balance organ is called the vestibular apparatus. It is composed of utriculus and sacculus.