The intestinal epithelium is a thin layer of cells lining the inside of the intestines. It plays a crucial role in digestion and nutrient absorption, acting as a barrier between the contents of the gut and the rest of the body. This layer is made up of specialized cells, including enterocytes, which absorb nutrients, and goblet cells, which produce mucus to protect the lining. Additionally, the intestinal epithelium is involved in immune responses, helping to defend against harmful bacteria and pathogens. It constantly renews itself, with new cells generated from stem cells located at the base of the intestinal crypts. This regeneration is vital for maintaining gut health and function.