Surface Epithelia. Simple Cuboidal Epithelium from the Rat Choroid Plexus
The villous processes (1) of the choroid plexus, which coats the roof of the third and fourth ventricles as well as parts of both lateral ventricles, are lined with cuboidal cells. Their free convex surface is covered with numerous, long microvilli. The round nuclei are primarily located in the middle of the cell body. A basal labyrinth (2) is important in the transport of metabolites.