which part if the ear is responsible for the sense of balance
The Vestibule and Semicircular Canals. While the cochlea is involved in hearing, the other two parts of the inner ear's bony labyrinth, the vestibule and semicircular canals, are involved in keeping you upright - your sense of balance, that is. The vestibule detects changes in linear acceleration - that is to say, movement in one direction.