The nervous system is a very complex system in the body. It has many, many parts. The nervous system is separated into two main systems, the central nervous system (CNS) and the secondary nervous system. The spinal cord and the brain make up the CNS. Its main job is to get the information from the body and send out commands. The secondary nervous system is made up of all of the wiring and nerves. This system is used to send the messages from the brain to the rest of the body.
Branches of Nervous System
Central Nervous System
The brain keeps the body in order. It helps to control all of the body systems and organs, keeping them working like they should. The brain also allows us to feel, think, remember and imagine. In general, the brain is what makes us behave as human beings.
Spinal cord and the nerves are used to make the communication between brain and rest of the boy. They tell the brain what is going on in the body at all times. This system gives instructions to all parts of the body about what to do and when to do it.
The Peripheral Nervous System:
The nervous system is made up of nerve cells or neurons that are "wired" together throughout the body, somewhat like communication system. Neurons carry messages in the form of electrical impulses. To keep the body function, the messages moves from one neuron to another.
Neuron:
A neuron is a type of cell that is found in the bodies of most animals. The features of the neuron are electrical excitability and the presence of synapses, which are complex membrane junctions used to transmit signals to other cells. The body's neurons and the glial cells that give them structural and metabolic support, together constitute the nervous system.
In vertebrates, the majority of neurons belong to central nervous system, but some reside in peripheral ganglia, and many sensory neurons are situated in sensory organs such as the retina and cochlea.
