b) Scheme illustrating a fold in a columnar/cubic monolayer epithelium. Cells adopt the called "bottle 23 shape" that would be simplified as frusta. c) Mathematical model for an epithelial tube.

Barrett's esophagus is an acquired metaplastic abnormality in which the normal stratified squamous epithelium lining of the esophagus is replaced by an intestinal-like columnar epithelium.

The epithelial cells that line our surfaces exist as single or multiple layers with flat, columnar or cuboidal appearance, depending on the tissue. Many epithelia are often exposed to physical ...