Figure 14-12.

Ependymal and Choroid Plexus Epithelial Cells.

A, Ependymal cells are ciliated (arrows) and assist with the flow of cerebrospinal fluid (CSF) through the ventricular system. H&E stain. B, Choroid plexus epithelial cells (arrows) produce CSF from a brush border (microvilli) on the luminal surface. The surface of the choroid plexus also has cilia that occur singly or more often in groups of three or more on a single cell. H&E stain.

(Courtesy Dr. J.F. Zachary, College of Veterinary Medicine, University of Illinois.)