anatomical heart 3d model

Create a realistic anatomical 3D human heart based on the provided reference image. Maintain correct human anatomical proportions. Include clearly recognizable: right atrium, left atrium, right ventricle, left ventricle, aorta, pulmonary artery, pulmonary veins, superior vena cava, inferior vena cava, septum, and major coronary vessels. Professional medical education model. Clean topology. Realistic biological material. No text. No labels. No arrows. No background. No human body. Optimize the mesh for real-time Android mobile rendering. Avoid unnecessary high-density geometry. The final model should be suitable for interactive rotation, zooming and object selection in a Flutter educational application.