Ключевые слова: absorption, anatomical, anatomy, art, belly, biology, blue, body, bowel, cell, cells, clip, diagram, digest, digestion, digestive, duodenum, epithelial, epithelium, fold, gastrointestinal, gut, health, histology, human, ileum, illustration, intestinal, intestine, intestines, jejunum, lining, medical, microvilli, organ, physiology, science, scientific, small, stomach, structure, surface, system, torso, tract, tube, villi, villus, wall,