blood brain barrier (bbb) science

neuron biochemistry neurological disease tight junctions hydrophobic cerebrospinal fluid solutes diffusion non-polar molecules brain capillaries glial cells neurons cns central nervous system extracellular non-selective crossing astrocytic feet astrocyte cell projections vector graphic design diagram scientific science educational education anatomical anatomy biology neurobiology neurology brain astrocyte blood vessel bbb barrier semipermeable border endothelial cells bloodstream