Peripheral and Autonomic Nervous System

Subject: Science

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Overview

Peripheral nervous system includes the nerves that arise from the brain and spinal cord. There are 31 pairs of nerves that arise from the spinal cord and called spinal nerve. They connect the organ system to the brain.This is a short note explanation of what peripheral and autonomic nervous system are.
Peripheral and Autonomic Nervous System

Peripheral Nervous System (PNS)

It includes the nerves that arise from the brain and spinal cord. There are twelve pairs of nerves which directly arise from the brain and called cranial nerve. Similarly, there are 31 pairs of nerves that arise from the spinal cord and called spinal nerve. They connect the organ system to the brain.

Autonomic Nervous system (ANS)

It is the system of ganglion and sub-ganglion. The local swelling of nerves in organs are called ganglion and further swelling of nerves to various part of the organ is called sub-ganglia. It is divided into sympathetic and parasympathetic nervous system. The function of ANS is to maintain body steady state rapidly.

Cranial Nerves: They arise from brain and terminate inside it except the Vague. There are 12 pairs of cranial nerves in human beings. They control the activities of eyes ears and tongue etc.

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Spinal nerves: They arise from the spinal cord and spread to different parts of the body. There are 31 pairs of spinal nerves in the human beings. Out of them,8 are cervical 12 are thoracic 5 pairs of lumbar 5 pairs of sacral and 1 pair coccygeal nerves.

Things to remember
  • Peripheral nervous system includes the nerves that arise from the brain and spinal cord.
  • There are 31 pairs of nerves that arise from the spinal cord and called spinal nerve. They connect the organ system to the brain.
  • Cranial Nerves arise from brain and terminate inside it except the Vvague.
  • Spinal nerves arise from the spinal cord and spread to different parts of the body.
  • It includes every relationship which established among the people.
  • There can be more than one community in a society. Community smaller than society.
  • It is a network of social relationships which cannot see or touched.
  • common interests and common objectives are not necessary for society.
Videos for Peripheral and Autonomic Nervous System
Autonomic nervous system
Introduction to the peripheral nervous system
Questions and Answers

There are 12 pairs of cranial nerves and 31 pairs of spinal nerves in human body.

The nerves that arise from brain and terminate inside it except the Vague is called cranical nerves.

The glands in human body produce different hormones or enzymes. With the help of glands, different body parts function in proper way.

The rapid conduction of message in the form of electrical impulses from one part of the body to another and co-ordination of the body activity is called nervous system.

The endocrine glands do not bear a duct and the hormones produced from them are directly mixed up with the blood. The exocrine glands bear duct.

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