Why Do We Have Different Kinds of Sleep?

We have different kinds of sleep because each kind helps us in a special way. Like when you're playing with your toys, you need to rest and get ready for more fun. In the night, your brain switches between two kinds of sleep: one that helps you relax, and another that helps you learn and remember things.

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Examples

When you're tired from playing outside all day, your body goes into deep sleep to feel refreshed.
Dreaming happens during the night when you're in REM sleep, that's why you might wake up with a smile or even a nightmare!
After a long day of school, your brain uses light sleep and deep sleep to store what you learned.

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Categories: Health · sleep,brain function,health