LM of skeletal muscle showing parts of several muscle fibers in transverse section. Eosinophilic staining characteristics and punctate appearance are due to the contractile proteins, which constitute much of the sarcoplasm of each cell. Multiple rounded to oval nuclei (arrows) sit under the sarcolemma of each cell. Nuclei of satellite cells are not visible in conventional H&E sections, but they lie between the sarcolemma and the thin external lamina. Nerve fascicles (Nerve) of various sizes and capillaries (C) abound in surrounding endomysium. 700×. H&E