Our BRAIN is our boss,, but it can't do it alone.. It needs some nerves — actually a lot of them.. And it needs the spinal cord,, which is a long bundle of nerves inside our spinal column.. It's the spinal cord and nerves known as the nervous system that let messages flow back and forth between the BRAIN and body..

If a spiky cactus falls off a shelf headed right on our best friend,, our nerves and BRAIN communicate so that we jump and yell for our friend to get out of the way.. If we're really good,, maybe we're able to catch the plant before it hits our friend..

We can't see these nerves without a microscope.. Our Nervous system is made up of millions and millions of neurons,, which are microscopic cells.. Each neuron has tiny branches coming off it that connect with many other neurons.. When we were born,, our BRAIN came with all the neurons it will ever have,, but many of them were not connected to each other.. When we learn things,, the messages travel from one neuron to another.. Eventually,, the BRAIN starts to create connections or we can say pathways between the neurons,, so things become easier..

Think back to the first time we rode a bicycle.. Our BRAIN had to think about pedaling,, balancing,, steering handlebars,, watching road and hitting the brakes,, all at once.. As we got practice more,, the neurons sent messages back and forth until a pathway was created in our BRAIN.. Now we can ride our bicycle without thinking about it because the neurons have successfully created a "riding" pathway..

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