The four main structures of the nervous system are:
- Brain: The brain is the control center of the body. It receives information from the body through the nervous system and sends instructions back out.
- Spinal cord: The spinal cord is a long bundle of nerves that runs from the brain down through the back. It carries messages between the brain and the rest of the body.
- Nerves: Nerves are long, thin fibers that carry messages between the brain and spinal cord and the rest of the body.
- Peripheral Nervous System (PNS): The PNS is made up of all the nerves that branch off from the brain and spinal cord. These nerves connect the central nervous system to the rest of the body.
These structures work together to control all of the body's functions, including movement, sensation, thought, and emotion.
