The word "sleep" refers to the basic physiological processes complex and consistent with the pace of biological organisms. The physiological changes of organs. In a way to relax the sleep is a conscious level decreased. Responses to stimuli and body movement less or none at all. By acting out in the calm, close your eyes, and the rest of the body, the heart slows, breathe slowly is a condition occurring only temporarily be changed easily. Awoken. By stimulating from stimuli proper.
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