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WormRabbit t1_j8vu6qa wrote

Reply to comment by CrateDane in Is blood toxic to neurons ? by AdEnvironmental8339

What is the blood-brain barrier physically made of? If I opened a head, what would it look like?

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CrateDane t1_j8w281q wrote

There are thin cells called pericytes wrapped around the small blood vessels, and around that you have extensions of astrocyte cells. The barrier is too small to see with the naked eye.

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