Membranous labyrinth

Membranous labyrinth is a component of the inner ear that plays a crucial role in the human body's balance and hearing systems. It is a complex system of fluid-filled tubes and sacs, which are suspended within the bony labyrinth.

Structure

The membranous labyrinth is composed of three main parts: the cochlea, the vestibule, and the semicircular canals. Each of these parts has a specific function in the process of hearing and balance.

Cochlea

The cochlea is a spiral-shaped part of the membranous labyrinth, responsible for converting sound vibrations into electrical signals that can be interpreted by the brain. It contains the organ of Corti, which is the sensory organ of hearing.

Vestibule

The vestibule is the central part of the membranous labyrinth. It contains two sac-like structures, the utricle and the saccule, which are filled with a fluid called endolymph. These structures are responsible for detecting changes in the body's position and acceleration.

Semicircular Canals

The semicircular canals are three loop-shaped structures that are oriented at right angles to each other. They are filled with endolymph and contain sensory hair cells that detect rotational movements of the head.

Function

The membranous labyrinth plays a crucial role in the body's balance and hearing systems. The cochlea converts sound vibrations into electrical signals that can be interpreted by the brain, while the vestibule and semicircular canals detect changes in the body's position and acceleration, helping to maintain balance.

Clinical Significance

Diseases and conditions that affect the membranous labyrinth can lead to symptoms such as vertigo, tinnitus, and hearing loss. These include Meniere's disease, vestibular neuritis, and labyrinthitis.

See Also

• Bony labyrinth
• Inner ear
• Vestibular system
• Auditory system