Part 1 of Essay
Sleep, why do people sleep at all? Why can't we just stay awake? Some biologist suggest that sleep provides the opportunity to conduct self-repair and purge the body of it's waste that has built up during the day's activity. Nevertheless, the body is capable of repairing itself and disposing of wastes during waking hours, ....

Part 2 of Essay
.... of would destroy specific brain structures of a lab animal and then note how the animal slept. For instances, in one lab animal the researcher cut through the axis of the brain at one level, which would prevented the animal from awakening; showing that brain structures below the level of the cut were responsible for awakening the lab animal. The American Sleep Disorders Association (ASDA), Association for the Psychophysiological Study of Sleep (APSS), Association of Sleep Disorder Centers (ASDC), and the ....