Prove that sleep is a device that protects the body from overwork.

In general, sleep is the inhibition of the main sections of the cerebral cortex. Thanks to this, neurons rest and recover. Sleep has two phases: slow sleep and fast sleep. During a slow one, the muscles relax, breathing becomes even, the heartbeat slows down, the eyeballs are motionless. This phase is much longer than REM sleep. Thus, it can be proved that sleep is an adaptation that protects the body from overwork.