Spinning makes you dizzy. Why?

When you spin around a lot, how come you get dizzy?

You know that your ears do the important job of hearing. The inner parts of your ears also do another job: they give you a sense of balance. Deep inside your ears are some special cavities filled with fluid. Inside these cavities are sensitive little hairs attached to nerve cells. Any movement of your head makes the fluid slosh around. That bends the little hairs, and the nerve cells tell your brain about the movement.

When you spin around, there is a short time lag before the fluid spins, too. So you feel that you are spinning. When you stop, the fluid keeps spinning for a while. That may make you feel that you are spinning backward. We call that being dizzy.