Epithelial cells help to protect or enclose organs; some produce mucus or other secretions. Certain types of epithelial cells have tiny hairs called cilia, which help remove foreign substances.
Review Date 10/8/2018
Updated by: Linda J. Vorvick, MD, Clinical Associate Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.