Ключевые слова: 3d, anatomy, background, biology, body, care, cross, digestion, digestive, drawing, duodenum, esophagus, five, food, gastric, health, healthcare, healthy, heartburn, human, illustration, isolated, layer, medical, medicine, mucosa, muscle, muscular, nutrition, organ, pain, science, section, senses, stomach, structure, symbol, system, ulcers, white,