The cerebellum coordinates movement, the cerebrum stores the memory and the medulla oblongata takes care of your body's basic needs. The left side of your brain controls the right side of your body, and vice versa. It has between 20 and 200 billion neurons and your body can't make new brain cells. The brain is protected by a fluid. Only these pools of fluid and the skull protect the brain from the bumps and grinds of daily living which would damage this fragile organ.
Eyes work a lot like a camera.
They take in light, focus light, and, with help from the brain, figure out what you're seeing. Light bouncing into your eye passes through an opening called the pupil. If you look in the mirror, your pupil is the black area in the middle of your eye. The pupil can open or close, depending on the brightness of the light. After passing the pupil, the light is focused onto the back of your eye by the lens, a thin layer of cells.