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this picture explain many things in a human body,useful article in fact

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nice to know it. good job

human body helpful

very helpful

need 2 know evry1

helpful topic

insomnia is dangerous

Sleeping is very important

yes right @kakon
Sleeping is very Importance part all human body, and Thanks for this picture explain many things in a human body, Thanks For sharing your helpful image.

Sleep plays a critical role in thinking and learning. Lack of sleep hurts these cognitive processes in many ways. First, it impairs attention, alertness, concentration, reasoning, and problem solving. This makes it more difficult to learn efficiently....very good post.i like it....

well post

nice post