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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 familiar sounds of your heart are made by the heart's valves as they open and close.
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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.