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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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Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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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 average office desk has 400 times more bacteria on it than a toilet.