The Blood Brain Barrier

Components of the BBB

  • Tight junctions between the capillary endothelial cells
  • Continuous homogenous basement membrane
  • Numerous astrocytic processes

Parts devoid of Blood Brain Barrier - circumventircular organs (CVO).

  1. The pineal body
  2. The subcommissural organ
  3. The subfornical organ
  4. The organum vasculosum of the lamina terminalis (supra-optic crest)
  5. The median eminence
  6. The neurohypophysis
  7. The area postrema