Abstract The choroid plexus (CP) is a highly vascularized structure located in the ventricles that forms the blood-CSF barrier (BCSFB) and separates the blood from the cerebrospinal fluid (CSF). In addition to its role as a physical barrier. the CP functions in CSF secretion. transport of nutrients into the central nervous system (CNS) and a gated point of entry of circulating immune ... https://www.chiggate.com/3m-speedglas-9002nc-welding-helmet-fashion/