Sleep rejuvenates your body. There are numerous different stages of sleep the deepest being zen sleep. Zen is a Chinese word for relax. Zen sleeping is when you have dreams and your body remembers information from earlier in your day that you might forget otherwise.
Sleep gives your brain time to recooperate from the previous day of work, and it also gives your whole body (organs and all) time to rest, and have a break from everything, so you’re whole body is basically shut down when resting
