What is the meaning of bony labyrinth?
The bony labyrinth (also osseous labyrinth or otic capsule) is the rigid, bony outer wall of the inner ear in the temporal bone. It consists of three parts: the vestibule, semicircular canals, and cochlea. These are cavities hollowed out of the substance of the bone, and lined by periosteum.
Where in the body is the bony labyrinth?
temporal bone The bony labyrinth, a cavity in the temporal bone, is divided into three sections: the vestibule, the semicircular canals, and the cochlea.
What is bony labyrinth and membranous labyrinth?
The internal ear (Fig. 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.
What does labyrinth mean in anatomy?
Medical Definition of labyrinth : a tortuous anatomical structure especially : the inner ear or its bony or membranous part — see bony labyrinth, membranous labyrinth.
What is an endolymph?
Endolymph, also known as Scarpa fluid, is a clear fluid that can found in the membranous labyrinth of the inner ear. It is unique in composition compared to other extracellular fluids in the body due to its high potassium ion concentration (140 mEq/L) and low sodium ion concentration (15 mEq/L).
What is membranous labyrinth?
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.
What fluid is in the bony labyrinth?
endolymph 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. The endolymph has concentrations of electrolytes that differ from those of typical body fluids.
What does bony labyrinth consists of?
The cavity is known as the bony labyrinth. The bony labyrinth consists of a central chamber, the vestibule, the three semicircular canals, and the spiral cochlea.