anatomical heart 3d model

Create a highly realistic 3D human heart model with correct anatomy: atria, ventricles, major vessels (aorta, vena cava, pulmonary arteries and veins), valves, and coronary vessels. Accurate proportions, detailed surface, and clear chamber definition. Mesh must be clean and optimized for WebAR/Unity. Use natural colors and PBR textures (base color, normal, roughness). Export in GLB or FBX. Style: clinical, non-cartoonish.