Why does a person want to sleep?

A person sleeps about 1/3 of his life. Sleep is an important part of life. During this process, some organ systems can rest, restore the supply of organic matter. But in principle, the organs work in the same mode as during wakefulness. The main purpose of sleep is to sort the information that the brain receives during the day. When we sleep, the brain removes unnecessary information, information received recently, and also sorts it. Even if you are all day in one room, the brain will accumulate a large amount of information, and it must be processed.