Talk about ependymal cells

These are epithelial cells lining the cerebral ventricles and the ependymal canal. They form a simple ciliated cubic or prismatic epithelium separating the cerebrospinal fluid from the underlying nervous tissue. Their apical membrane has the appearance of a brush and presents, between the cilia, short microvillosities. They secrete the cerebrospinal fluid and play an important role in the exchanges between the cerebrospinal fluid and the cerebral parenchyma.