Intestinal crypts, also known as crypts of Lieberkühn, are small, tubular structures located in the lining of the small intestine and large intestine. They are responsible for producing intestinal secretions, including enzymes and mucus, which aid in digestion and protect the intestinal lining. These crypts contain various cell types, including enterocytes for nutrient absorption and goblet cells that secrete mucus. The cells in intestinal crypts are continuously renewed through a process called cell turnover. Stem cells at the base of the crypts divide and differentiate into specialized cells that migrate upward to replace older cells. This regeneration is crucial for maintaining a healthy intestinal barrier and ensuring efficient digestion.