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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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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.
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There are approximately 3 million unintended pregnancies in the United States each year.