This anatomical model presents a cross section at the level of the twelfth thoracic vertebra to clearly show the positional relationships among abdominal organs, the peritoneum, and the omental structures. Key features and benefits Accurate crosssectional display: The model highlights the location and relationships of the striate hole, omental hole, and retina, and shows how the omental sac connects with the greater peritoneal cavity. Detailed anatomical boundaries: The omental hole is shown as the only channel into the omental sac, with anterior boundary the duodenal ligament, posterior boundary the peritoneum of the inferior cava, upper boundary the caudate lobe of the liver, and lower boundary the duodenal bulb. Multiple organ cross sections: Stomach, kidney, spleen, and liver cross sections are included to show adjacent relationships and the connections between the retina and the peritoneal cavity and flat membrane. Digital indicator marks: Clearly numbered digital markers are incorporated to facilitate accurate study, guided learning, and efficient reference during teaching or selfstudy. Colorcoded for teaching: Different structures are color differentiated and handpainted using computer color matching to enhance visual clarity and classroom engagement. Durable, realistic material: Made from environmentally friendly PVC material and handpainted for a nearrealistic appearance and longlasting use. Compact dimensions: 40.5 x 26.5 x 10 cm, suitable for tabletop demonstrations and easy storage. Typical use scenarios Classroom demonstration for anatomy and physiology courses to illustrate crosssectional abdominal anatomy. Teaching aid for instructors and group study sessions to guide students through numbered structures and spatial relationships. Reference model for preclinical labs or educational workshops where visualizing the omental foramen and adjacent organ relationships is required. This model is designed as a practical educational tool to improve understanding of abdominal crosssectional anatomy and to support structured, efficient learning.