Ключевые слова: 3d animation, adult, adults only, anatomy, biology, cecum, colon, digestive system, duodenum, healthcare and medicine, human digestive system, human intestine, human stomach internal organ, ileum, illness, illustration, infectious disease, inflammation, intestine, jejunum, large intestine, medicine, one person, pain, rectum, research, science, small intestine, stomach, the human body, viral infection, virus,