MICROANATOMY

Detailed explanation-1: -Simple columnar epithelium : This type of epithelium is often specialized for absorption and usually has apical cilia or microvilli. These cells line your stomach and intestines.

Detailed explanation-2: -Microvilli, found in tightly packed arrays on the apical surfaces of polarized epithelial cells, increase the surface area of the cell exposed to the lumen to enhance absorption and secretion.

Detailed explanation-3: -Every cell lining the small intestine bristles with thousands of tightly packed microvilli that project into the gut lumen, forming a brush border that absorbs nutrients and protects the body from intestinal bacteria.