Scientist have really faced many difficulties in defining sleep.According to them, sleep is a state of body in which the body is unconscious and the person can be brought back to normal from that state.At these point the human brain pays more attention to the internal responses then to the external signals.
We need to sleep to regain our bodies function and relaxes our mind. Without proper amount of sleep, our body weaken, our minds can’t function well. Enough sleep is also one of the reasons for a flawless skin and younger look, with of course proper food intake and exercise.
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