Ключевые слова: absorption, anatomical, anatomy, background, biology, cell, cilia, ciliated epithelium, colon, columnar, columnar epithelium, cross section, cytological, digestion, digestive, disease, duodenum, epithelial, epithelial cells, epithelial tissue, epithelium, gastrointestinal, gut, health, histological, histology, histopathology, human, intestinal, intestinal health, intestinal villus, intestine, intestines, large intestine, medical, medicine, micrograph, microscope, microscopic, microscopic view, microscopy, microvilli, mucosa, nutrition, organ, photomicrograph, pseudostratified, science, scientific, section, simple columnar epithelium, squamous, stomach, submucosa, system, tissue, tumor, villi,