In general, a satellite is anything that orbits something else, as, for example, the moon orbits the earth. In a communications context, a satellite is a specialized wireless receiver/transmitter that is launched by a rocket and placed in orbit around the earth. There are hundreds of satellites currently in operation.
Nervous System. The nervous system consists of the brain, spinal cord, sensory organs, and all of the nerves that connect these organs with the rest of the body. Together, these organs are responsible for the control of the body and communication among its parts. The brain and spinal cord form the control center known as the central nervous system (CNS), where information is evaluated and decisions made.
Nervous System. The body has connectors neurons that communicate signals throughout the body. Messages are sent through nerves called neurons that are responsible for communication in the body. The nervous system controls the body's sense of smell, hearing, tasting, seeing and touching. The brain is the largest function of the nervous system.