To give your brain and body time to rest.
Why do we need to sleep?
it's good for all of our body but is the best for our "Brain "!
our Brain needs it ! Needs to Recovery itself and Refresh itself !
I said it really simple there are so many reasons !
Its something that's very important for our bodies. We also need to function by day so we get sleep.
Sleep also seems to affect our appetite. Scientists have discovered that sleep really is, to quote Shakespeare, “chief nourisher in life’s feast.” Our brain interprets a lack of sleep as a lack of food. While we sleep, our organism secretes leptin, the hormone that normally lets our body know that we have eaten enough.
When we stay awake longer than we should, our body produces less leptin, and we feel a craving for more carbohydrates. So sleep deprivation can lead to increased carbohydrate consumption, which in turn can lead to obesity. Without a doubt, sleep is vital for a healthy body and mind.
It's a fundamental 'recharge' activity that the brain requires. Processes of the brain happen during the sleep mode, that don't happen while one awake.