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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.
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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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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.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.