| arachnoid villi |
Microscopic tufts of pia-arachnoid mater that pierce the dura and open into venous sinuses, lacunae or extradural veins. They permit unidirectional flow of cerebrospinal fluid from the subarachnoid space to the venous system.
출처: www.umanitoba.ca/faculties/medicine/anatomy/neuro/...
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