human heart 3d model

Anatomically accurate adult male human heart in a tense and engorged state, resting naturally on a flat surface. Hyper-realistic biological specimen, extremely detailed coronary arteries with subtle relief, organic muscle fiber textures, wet flesh surface with subsurface scattering. Medical-grade 3D scan style, photogrammetry quality, 8k high-fidelity. The model must be a seamless manifold mesh, watertight geometry with no internal cavities, optimized for mold making and 3D printing. Professional practical effects (SFX) prop style, realistic proportions.