stomach 3d model

Generate a clean 3D anatomical model of a human stomach based on the reference image. Keep the stomach as a single isolated organ with a cutaway section exposing the inner mucosal lining. Include one clearly defined gastric ulcer as a small round inflamed crater on the inner stomach wall. Maintain smooth medical-anatomy surfaces and a simplified educational style. No surrounding organs, no labels, no arrows, no gore, no blood, white background.