Ключевые слова: 3d, absorption, absorptive, anatomy, background, belly, bile, biology, bowel, cancer, care, cells, cholesterol, closeup, colon, digestion, digestive, duodenum, enterocytes, enzymes, epithelial, epithelium, gastric, gastrointestinal, gut, health, histology, human, intestinal, intestine, large, lining, lumen, medical, medicine, microscopic, microvilli, minerals, mucosa, nutrients, nutrition, small, stomach, surface, system, tissue, tract, villi, villus,