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The human body produces and destroys 15 million blood cells every second.
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There are 60,000 miles of blood vessels in every adult human.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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The average office desk has 400 times more bacteria on it than a toilet.
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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.