human heart 3d model

Complete, intact human heart 3D model, full anatomical structure with no cutaways, no missing parts, and no clipping. Entire heart must be visible in one piece, centered in frame, fully contained within view. Include all major external components: aorta, pulmonary artery, superior and inferior vena cava, pulmonary veins, and detailed coronary arteries wrapping the surface. Show accurate proportions with clearly defined chambers and thicker left ventricle. Realistic organic shape, clean topology suitable for animation. Photorealistic PBR materials, 4K textures, deep red-brown muscle, arteries bright red, veins darker tones, subtle wet surface with subsurface scattering. No cross-section, no half model, no slicing, no cropping, no occlusion, no stylization, no text, no labels.