Think of the nervous system as a very important communications network. The brain is the headquarters of this network. Your brain is made up of around 100 billion nerve cells. The surface of the brain is wrinkled with deep grooves divide it into sections. Your brain is encased in the protective bone structure called the skull.
The brain acts like a super computer which transmits instructions in the form of nerve impulses. These nerve signals travel from the brain along the spinal cord and along the vast network of nerves that run throughout the body. These nerve signals instruct different body part to carry out certain tasks such as.
- Body movement
- Eyes blinking
The brain is divided into three main sections. The sections are called the cerebrum, the cerebellum, and the brain stem. The cerebrum makes up the larger portion of the brain. The cerebellum is underneath the back part of the cerebrum. The brain stem connects with the spinal cord at the base of the brain.