OtterKnow Kids Encyclopedia

While you sleep, your breathing gets slow and deep, and your heart doesn’t have to work as hard. Your brain files away everything you learned during the day so you can remember it later. Your brave white blood cells also use this time to fight off any germs that try to make you sick!

Sleep gives your body the time it needs to repair and grow. Without enough sleep, your body cannot do all this important work. Getting a good night’s sleep is the coolest superpower your body has!

• Your body releases a special growth hormone mostly while you are sleeping!
• You go through different stages of sleep during the night, including a stage called REM where your eyes move quickly under your eyelids.
• Your brain is actually very active during sleep, even though your body is still!