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Vagus nerve is:

Vagus nerve is: Correct Answer X cranial nerve

Concept:
  • The nerves which arise from the brain are called the cranial nerves.
  • Humans and other mammals have 12 pairs of cranial nerves.
  • There are 3 types of cranial nerves based on their action
  1. Sensory 
  2. Motor
  3. Mixed

Explanation:

  • The Xth pair of the cranial nerve is called the ''Vagus nerve''.
  • It supplies the larynx, lungs, heart, stomach & intestine
  • It is the longest cranial nerve and is involved in visceral sensation & movements.

Important Points 

  • The largest cranial nerve is the Trigeminal nerve.
  • The smallest cranial nerve is the trochlear nerve.

​Additional Information 

The nervous system of the human body is divided into three parts:

Central Nervous System:

  • It is a part of the nervous system which keeps control of the whole body and on the nervous system itself.
  • It is made up of two parts - The brain and Spinal Cord.

Peripheral Nervous System:

  • It is made up of the nerves arising from the brain and spinal cord called cranial and spinal nerves respectively.

Autonomic Nervous System:

It is made up of some brain nerves and some spinal cord nerves.

There are two parts of the Autonomic Nervous System:

  1. Sympathetic Nervous System:
  • It narrows blood vessels in the skin.
  • It increases the secretion of sweat glands.

       2 .​Parasympathetic Nervous System:

  • It increases the secretion of Saliva.
  • It creates contraction and motion in intestinal walls.

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