blood-brain barrier

физиология гемоэнцефалический барьер

Англо-русский научно-технический словарь
blood-brain barrier

noun Date: 1944 a naturally occurring barrier created by the modification of brain capillaries (as by reduction in fenestration and formation of tight cell-to-cell contacts) that prevents many substances from leaving the blood and crossing the capillary walls into the brain tissues

Энциклопедический словарь Мерриама-Вебстера