please tell about peripheral nervous system with structure?
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The peripheral nervous system
Understand how the central nervous system communicates with the whole body through a network of nerves called the peripheral nervous system
Understand how the central nervous system communicates with the whole body through a network of nerves called the peripheral nervous system
The peripheral nervous system connects the body as a whole to the central nervous system through 31 pairs of spinal nerves, which link to the spinal cord, and 12 pairs of cranial nerves, which link directly to the brain itself.
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The peripheral nervous system is a channel for the relay of sensory and motor impulses between the central nervous system on one hand and the body surface, skeletal muscles, and internal organs on the other hand. It is composed of (1) spinal nerves, (2) cranial nerves, and (3) certain parts of the autonomic nervous system. As in the central nervous system, peripheral nervous pathways are made up of neurons (that is, nerve cell bodies and their axons and dendrites) and synapses, the points at which one neuron communicates with the next. The structures commonly known as nerves (or by such names as roots, rami, trunks, and branches) are composed of orderly arrangements of the axonal and dendritic processes of many nerve cell bodies.