The nervous system is the latest system evolved for the purpose of co-ordination, reception of external stimuli and response to them. The nervous system is composed of the brain and spinal cord and the nerves given off by these structures.
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The visceral system of the Peripheral Nervous System is known as the Autonomic Nervous System. The sensory (afferent) and motor (efferent) nerves connecting the surface of the body with the central nervous system constitute the peripheral nervous system.
The peripheral nervous system consists of the sensory and motor neurons that transmit message to and from the central nervous system. Without the peripheral nervous system, our brain will be isolated from the world.
There are three kinds of neurons present in our body; namely sensory neurons, inter-neurons, and motor neurons. All these neurons taken together constitute the nervous system.
The nervous system is the most complex and delicate of all the body systems. The brain is the centre of the nervous system. It controls all other parts of the body. The brain sends and receives messages through a network of nerves.