portion of the labyrinth of the inner ear that is located inside the bony labyrinth and separated from it by the perilymph; made up of the membranous semi-circular canals, the saccule and utricle, and the cochlear duct

Endolymph-filled tubes that enclose the receptors of the inner ear.

the sensory structures of the inner ear including the labyrinthine receptors and the cochlea; contained within the bony labyrinth

Membranous vessel comprising contiguous tubes and sacs contained within the bony labyrinth. This contains endolymph and the sensory cells for hearing and spatial orientation.

The membranous labyrinth is lodged within the bony labyrinth, and has the same general form; it is, however, considerably smaller, and is partly separated from the bony walls by a quantity of fluid, the perilymph.