Bloodâbrain barrier
Semipermeable capillary interface between blood and the brain
The bloodâbrain barrier (BBB) is a highly selective semipermeable border of endothelial cells that regulates the transfer of solutes and chemicals between the circulatory system and the central nervous system, thus protecting the brain from harmful or unwanted substances in the blood. The bloodâbrain barrier is formed by endothelial cells of the...