What is the small instestine lined with?

The small intestine is lined with a mucosal layer that features numerous finger-like projections called villi, which increase its surface area for nutrient absorption. The epithelial cells on these villi contain microvilli, further enhancing absorption. This lining also includes specialized cells that produce digestive enzymes and absorb nutrients, as well as goblet cells that secrete mucus to protect the intestinal wall. Overall, the lining of the small intestine plays a crucial role in digestion and nutrient absorption.