This detailed 3D Electron Transport Chain (ETC) model visually represents the process of cellular respiration and ATP production within the inner mitochondrial membrane. The model illustrates the major protein complexes, electron flow, proton pumping, proton gradient, oxygen reduction, and ATP synthase activity involved in oxidative phosphorylation. It is suitable for biology and science education, classroom demonstrations, medical and scientific visualization, educational animations, presentations, and 3D learning applications.