Functions of the Nervous SystemThis system functions as an autonomous entity in the body. The main purpose of this system is to receive information from the outside world and the body itself to make appropriate responses.
How the Nervous System Works?This system works by sending signals to other parts of the body. In fact, this communication system of the body permits fast and specific communication between broadly spaced parts of the body. These functions of the nervous system are done by the action of millions of dedicated nerve cells. These cells are called neurons, and they are the basic functioning cells of the nervous system. These cells not only gather and process information but also generate proper response signals to the every part of the body.
Learn more about Functions of Neurons
Each single neuron generating many specialized connections, called synapses, with other neurons and other cells in the body.
In actual fact, neurons are unable to run directly from the outer region to the brain. Synapses act as junctions for neuron cells, and they allow nerve impulses to be merged into one or divided up for neurons. They assist neuron cells by passing nerve impulses to targeted destination. Low frequency nerve impulses are also filtered out by synapses.
Learn more about Structure of Neurons.
Divisions of the Nervous SystemAnatomically, the nervous system has two subdivisions –
1. Central Nervous System (CNS) - Composed of the cerebrum and cerebellum part of the brain and the long tubular bundles of nerve tissues called as spinal cord.
2. Peripheral Nervous System (PNS) - Consists of the nervous tissues found outer part of the brain and spinal cord - the cranial and spinal nerves and their ganglia.
Functionally, the nervous system is divided into two systems –
1. Somatic Nervous System
2. Autonomic (Visceral) Nervous System
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What are Neurons?
What is the Structure of Neurons?
What are the Functions of Neurons?
Resource and Further Reading:
Dr. Selim Reza (2001). Nervous Tissue and Nervous System. The Essential of Gross Anatomy and Histology, 10th Edition (pp 129-170). Dhaka: Essence Publications.
Last Update: Friday, July 05, 2013.