The Nervous System
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The brain is made up of millions and millions of nerve cells called neurons. Almost all of them are there when you are born, but they are not connected with each other. When you learn things as a child the brain starts to create pathways between the neurons. As time goes on, things become easier for you to do and you don't have to think about them because you do them automatically.
The Nervous System
Image (modified) : Benevolent, CC BY-SA 4.0,
via Wikimedia Commons
