How Does The Choroid Plexus Form The Blood Brain Barrier?

How Does The Choroid Plexus Form The Blood Brain Barrier? The blood-cerebrospinal fluid (CSF) barrier is formed by tight junctions between neighboring choroid plexus epithelial cells—halting the paracellular movement of molecules both into, and out of, the brain. Additional chemical barriers exist to impede movement of molecules into the central nervous system. What is the