Skeletal muscle, anatomy illustration, detailed structure, fibers bundle, myofibrils, sarcomeres, Z-disks, M-lines, A-bands, I-bands, mitochondria, sarcoplasmic reticulum, t-tubules, transverse tubules, muscle fibers, fascicles, epimysium, perimysium, endomysium, tendon attachments, muscle belly, aponeurosis, close-up, microscopic view, 3D illustration, realistic texture, detailed shading, ambient occlusion, high contrast lighting.