This document provides an overview of the nervous system and its main components. It discusses that the central nervous system, made up of the brain and spinal cord, controls all the body's activities. The peripheral nervous system connects the central nervous system to other parts of the body through nerves and senses organs like the eyes, ears, skin etc. It describes how senses like vision, hearing, touch, smell and taste allow the body to receive information from the environment and send it to the brain for processing.