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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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There are more nerve cells in one human brain than there are stars in the Milky Way.
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The horizontal fraction bar was introduced by the Arabs.
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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.