Where is simple columnar epithelium primarily found?

Simple columnar epithelium is primarily found in the digestive tract, particularly lining the stomach and intestines. This type of epithelium is characterized by tall, column-shaped cells that are well-suited for absorption and secretion. In the digestive system, simple columnar epithelium facilitates the absorption of nutrients from digested food, as well as the secretion of mucus and digestive enzymes.

The cells often contain microvilli, which increase the surface area for absorption, and goblet cells, which secrete mucus to lubricate the intestinal contents. This arrangement helps to create an efficient barrier and a functional interface for the processes that occur in the digestive tract.