The eye is the body`s organ for the sense of sight.
THE EYE WORK.
When light reaches the eyeball, it goes through the cornea. Then it goes through the pupil. The ligh then passes through the lens which focuses the image on the retina. The information gathered by the retina travels to the brain through the optic nerve.
The brain : It is inside the skull. It has three main parts : the cerebrum, the cerebellum, and the brain stem .
Spinal cord . It is a thick cord made up of many neurons that goes through the inside of the spine. It is protected by vertebrae.
THE PERIPHERAL NERVOUS SYSTEM . It is made up of nerves: Sensory nerves : They transmit information from the sensory organs and internal organs to the central nervous system . Motor nerves : They transmit responses from the central nervous system to the muscles and glands of our bodies