|Brain: Choroid plexus|
|Scheme of roof of fourth ventricle. The arrow is in the foramen of Majendie.|
|Coronal section of lateral and third ventricles.|
|Gray's||subject #187 798|
Choroid plexus is present in the superior part of the inferior horn of the lateral ventricles. It follows up along this boundary, continuous with the inferior of the body of the lateral ventricles. It passes into the interventricular foramen, and is present at the top of the third ventricle.
There is also choroid plexus on the fourth ventricle, on the section closest to the bottom half of the cerebellum.
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Structure of the choroid plexus
The choroid plexus consists of many capillaries, separated from the subarachnoid space by pia mater and choroid ependymal cells. Liquid filters through these cells from blood to become CSF. There is also much active transport of substances into, and out of, of the CSF as it's made.