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The horizontal fraction bar was introduced by the Arabs.
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When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.
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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 longest a person has survived after a heart transplant is 24 years.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").