A peptic ulcer is a sore in the lining of the stomach or duodenum. It forms when stomach acid and digestive enzymes break down the protective mucosal barrier — often due to H. pylori infection or prolonged NSAID use. This animation shows a bleeding ulcer, where erosion reaches blood vessels beneath the mucosa. If untreated, it can lead to significant blood loss, perforation, or even shock. Animation based on SciePro’s 3D anatomy models. Available for B2B licensing — link in bio. #science #medica