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How does your brain work?

Your brain is the hub of your nervous system. It is made up of 100 billion nerve cells - about the same as the number of trees in the Amazon rainforest. Each cell is connected to around 10,000 others. So the total number of connections in your brain is the same as the number of leaves in the rainforest - about 1000 trillion.

Your brain is made up of 100 billion nerve cells - about the same as the number of trees in the Amazon rainforest.
Your brain is made up of 100 billion nerve cells - about the same as the number of trees in the Amazon rainforest.
Corbis

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