Why are ulcers more likely to be located in the duodenum than in the stomach?

Ulcers are more likely to occur in the duodenum than in the stomach due to differences in the protective mechanisms and the nature of the environment in these areas. The stomach has a thicker mucosal layer and produces more mucus to protect against its acidic environment, while the duodenum has less protective mucus and is exposed to digestive enzymes and bile. Additionally, factors like Helicobacter pylori infection and excess acid secretion can lead to duodenal ulcers, as they compromise the mucosal barrier in the duodenum more easily than in the stomach.