What is Lining of small intestine tissue?

The lining of the small intestine is composed primarily of a specialized epithelial tissue known as simple columnar epithelium, which features microvilli that increase the surface area for nutrient absorption. This lining also contains goblet cells that secrete mucus to aid in digestion and protect the intestinal wall. Beneath the epithelium, there is a layer of connective tissue, the lamina propria, and a thin layer of smooth muscle, which together support the structure and function of the small intestine. Additionally, specialized structures called villi and crypts enhance nutrient absorption and house intestinal glands.