How does the brain function?

The brain is the main organ of the central nervous system.

When you practice something over and over let's say piano music, then the neurons that make up your brain send messages between each other. There is a tiny gap between each neuron when the message is passed. When you practice over and over and the message is passed time after time your brain gets used to that message and that's how you learn. Sometimes if the message is passed only once it can stick, especially if it's very vivid or memorable.

When you drink too much alcohol at a young age it interferes with your brain while it is still developing and can kill something that cannot be fixed. It can shrink your brain and cause permanent damage and can lower your IQ.

I learned that in Health class. That's why I added the bit about alcohol. Haha. Hope I helped!