Technical skills and training of upper gastrointestinal endoscopy for new beginners

Figure 17 Intubation from stomach to duodenal bulb. A: Schematic diagram of the anatomy of the stomach. Based on the landmarks, the stomach is divided into three parts: the gastric fundus, gastric body and gastric antrum; B: A schematic diagram of gastric body subdivided into three areas. The gastric body is the largest among the three parts. Therefore, the gastric body can be subdivided into three areas: upper body, middle body and lower body; C: Schematic diagram of three subdivided areas of the gastric antrum.