ANATOMY

Detailed explanation-1: -Columnar epithelium cells are responsible for the absorption of the digested food materials. The small intestine acts as a protective barrier to bacteria and other microbes/pathogens but permits the absorption of digested food materials.

Detailed explanation-2: -Enterocytes are the major cell type in intestinal epithelium. They are simple columnar epithelial cells and play important roles in nutrient absorption (e.g., ions, water, sugar, peptides, and lipids) and in secreting immunoglobulins.

Detailed explanation-3: -Simple columnar epithelial cells absorb material from the digestive tract. Goblet cells secret mucous into the digestive tract lumen. Columnar epithelial cells are taller than they are wide: they resemble a stack of columns in an epithelial layer, and are most commonly found in a single-layer arrangement.

Detailed explanation-4: -The small intestine absorbs most of the nutrients in your food, and your circulatory system passes them on to other parts of your body to store or use.

Detailed explanation-5: -it absorbs nutrients from the lumen of the intestine. Simple columnar.