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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.
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Everyone has one nostril that is larger than the other.
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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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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.