Choroid plexus
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The choroid plexus, or plica choroidea, is a plexus of cells that arises from the tela choroidea in each of the ventricles of the brain. Regions of the choroid plexus produce and secrete most of the c
Choroid plexus
Choroid plexus
Choroid plexus
Blood–brain barrier
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The blood–brain barrier 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 syst
Choroid plexus
…epithelial cells and tight junctions that link them. There is a CSF-brain barrier at the level of the pia mater, but only in the embryo. Similar to the blood–brain barrier, the blood–CSF barrier functions to prevent the passage of most blood-borne substances into the brain, while selectively permitting the passage of…
Solute permeability at the BBB vs. choroid plexus
Astrocytes surrounding capillaries in the brain (artistic rendition)
Sketch showing constitution of blood vessels inside the brain