Final answer:
Our balance is maintained through the movement of fluid in our semicircular canals by tiny hair cells, which send nerve impulses to the brain. The brain then sends signals to muscles to help us stay balanced.
Step-by-step explanation:
Our balance is maintained through the detection of movement of the fluid in our semicircular canals by tiny hair cells. The semicircular canals are fluid-filled structures in the inner ear that detect changes in head position and movement. When the head moves, the fluid in the canals shifts, bending the hair cells and sending nerve impulses to the brain. The brain then sends signals to muscles to contract or relax, helping us stay balanced.