Epithelial cells make up the epithelium, a term used to describe body tissues (including skin and the gastrointestinal tract lining) that help protect organs or surfaces that have direct contact with anything from the outside world.
Definition of anemia: a condition in which the blood's capacity for transporting oxygen throughout the body is reduced, due either to a lack of red blood cells or a lack of hemoglobin. There are several types of anemia.
Autoantibodies are proteins that attack the body's own tissues.
In autoimmune diseases, the immune system attacks the body's own tissues by mistake.
A biopsy is a medical test in which cells or tissues are removed from the body.
Definition of casein (from About.com's Guide to Dairy-Free Cooking).
Definition of endoscopy, including upper GI endoscopy and colonoscopy.
