All of the nerves outside the spinal cord and brain make up the peripheral nervous system
The peripheral nervous system is part of the nervous system that contains the nerves that lies outside of the central nervous system (CNS). The major role of peripheral nervous system is to link the central nervous system to the skins, limbs and organs.
<h3>Further Explanation</h3>
The peripheral nervous system is consists of two components. The two components are
- The somatic nervous system
- The autonomic nervous system
The somatic nervous system consists of nerves, which are linked to the voluntary skeletal muscles. It also connects to the sensory receptors. It is composed of afferent nerves and afferent fibers.
The afferent nerves carries sensory information to the central nervous system (spinal cord) and the afferent fibers carry neutral impulses away from the central nervous system (CNS). Somatic system also play the role of transmitting sensory information including voluntary movement.
The automatic nervous system is also made of two components. The two components are:
- The sympathetic division
- The parasympathetic division
This system acts as the physiological arousal that are experienced by fearful person in emergency situation. such physiological arousal could be heartbeat, sweat or tremor.
- The sympathetic nervous system prepares or mobilizes the body to act in emergency situations.
- The parasympathetic helps to maintain the normal body functions and preserve physical resources. It controls operations in the body such as blood pressure, digestion and heart rate.
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KEYWORDS:
- The sympathetic division
- The parasympathetic division
- peripheral nervous system
- nerves
- brain
- cord
