ANATOMY

Detailed explanation-1: -The membranous labyrinth is a group of ducts and chambers filled with endolymphatic fluid. It is located within the bony labyrinth and can be subdivided into the vestibular labyrinth and cochlear labyrinth. The vestibular labyrinth contains two sacs (utricle and saccule) and three semicircular canals.

Detailed explanation-2: -The internal ear 7.68) consists of a bony labyrinth inside which is enclosed the membranous labyrinth. The membranous labyrinth contains endolymph and the sensory end-organs for hearing and vestibular functions. The bony labyrinth contains perilymph, which surrounds the membranous labyrinth.

Detailed explanation-3: -A liquid called perilymph, the properties of which closely resemble those of cerebrospinal fluid, flows between the bony and membranous labyrinths. Another fluid, called endolymph, is contained in the membranous labyrinth.

Detailed explanation-4: -The bony labyrinth consists of a central chamber, the vestibule, the three semicircular canals, and the spiral cochlea.