The blood-brain barrier protects the brain from pathogens in the blood but also makes it hard to deliver drugs to the brain.
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Your bones constantly rebuild themselves.
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Your bones are stronger than steel of the same weight.
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Your stomach gets a new lining every few days to avoid digesting itself.
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The human brain can process images in as little as 13 milliseconds.
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Humans can survive weeks with minimal calories.
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Your nose can detect over 1 trillion different scents.
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Your brain can store the equivalent of millions of gigabytes of information.
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The liver can regenerate itself — as little as 25% of the liver can regrow into a full organ.
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