Maintenance of body balance is performed by the inner ear along with hearing.
The inner ear has three basic parts which are interconnected: Vestibule, Semicircular canal, and Cochlea.
There are two types of body balance maintained by the ear, one is dynamic balance and the other is static balance.
Dynamic balance is maintained by three semicircular canals present in each ear which are filled with a fluid known as endolymph.
The semicircular canal has to swell near one of its ends known as the ampulla which contains sensory hair cells which are embedded in the cupula, a jelly mass of gelatinous material responsible for dynamic balance.
So, when we move our head cupula moves in the endolymph, and in this way, it pulls the hair and hair cells giving the message to the brain via auditory nerves,, and in this way, it maintains body balance.
Sensory hair cells of the vestibule are responsible for the static balance of the body.