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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The human brain continues developing into your mid‑twenties.
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Your mind exists inside your brain.
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Your bones are stronger than steel of the same weight.
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Your brain senses reality.
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Your brain edits out constant sensations like clothing touching your skin.
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Your senses are limited.
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Fingernails grow about three to four times faster than toenails.
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Your brain enables perception.
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