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.
The nervous system is very complicated. It controls how you move, how you feel, and also how your internal organs work (heart, stomach, etc.) There are two major parts of the nervous systemââthe central nervous system and the peripheral nervous system. The central nervous system is made up of the brain and the spinal cord. The brain serves as the body's control center. It controls movement, emotion, intellect, and speech. It interprets sound, sight, smell, taste and touch. The spinal cord sends messages between the brain and the rest of the body. The peripheral nervous system is made up of nerves that go from the spinal cord to the rest of the body. They include sensory and motor nerves.