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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
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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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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.