GENERAL HISTOLOGY

Detailed explanation-1: -The surface area of the small intestine is significantly enhanced by the presence of villi and microvilli, which increase the intestinal surface area by 30–600 fold, respectively. Villi are approximately 0.5–1.6 mm in length and are covered with columnar epithelial cells at the tip.

Detailed explanation-2: -The surface area is increased by folds, villi, and microvilli. Digested nutrients are absorbed into either capillaries or lymphatic vessels contained within each microvillus. The small intestine is perfectly structured for maximizing nutrient absorption.

Detailed explanation-3: -The inner surface of the mucosa has many finger-like projections called villi. The villi increase the surface area of the small intestine, which helps it absorb digested food.

Detailed explanation-4: -Villi increase the surface area for absorption and villi epithelium helps in the absorption of digested food. The surface of the villi absorbs the amino acids and glucose to pass them into the blood system.

Detailed explanation-5: -The function of the plicae circulares, the villi, and the microvilli is to increase the amount of surface area available for the absorption of nutrients.