What is Blood Brain Barrier? | MS Dictionary | Living Like You

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Blood-brain barrier

If you think about this one too long it might start to tickle: your brain wears a raincoat. JK. There’s no rain coat, there’s actually a layer of endothelial cells around the blood vessels in your brain (and spinal cord), that work to keep viruses and other harmful substances out of your bloodstream. But isn’t a brain in a rain coat more fun to think about?

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