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Skeletal muscle
This low magnification electron micrograph shows a portion of two skeletal muscle fibers. The cytoplasm of the fibers is completely filled with myofibrils. A peripheral nucleus in the one of fibers is also visible. Located between the myofibrils are mitochondria and elements of the endoplasmic reticulum. 5000x

Muscle fibers
This low magnification electron micrograph shows a portion of two skeletal muscle fibers. The cytoplasm of the fibers is completely filled with myofibrils. A peripheral nucleus in the one of fibers is also visible. Located between the myofibrils are mitochondria and elements of the endoplasmic reticulum. 5000x

- Myofibrils
This low magnification electron micrograph shows a portion of two skeletal muscle fibers. The cytoplasm of the fibers is completely filled with myofibrils. A peripheral nucleus in the one of fibers is also visible. Located between the myofibrils are mitochondria and elements of the endoplasmic reticulum. 5000x

- Nucleus
This low magnification electron micrograph shows a portion of two skeletal muscle fibers. The cytoplasm of the fibers is completely filled with myofibrils. A peripheral nucleus in the one of fibers is also visible. Located between the myofibrils are mitochondria and elements of the endoplasmic reticulum. 5000x

- Mitochondria
This low magnification electron micrograph shows a portion of two skeletal muscle fibers. The cytoplasm of the fibers is completely filled with myofibrils. A peripheral nucleus in the one of fibers is also visible. Located between the myofibrils are mitochondria and elements of the endoplasmic reticulum. 5000x

- Sarcolemma
This low magnification electron micrograph shows a portion of two skeletal muscle fibers. The cytoplasm of the fibers is completely filled with myofibrils. A peripheral nucleus in the one of fibers is also visible. Located between the myofibrils are mitochondria and elements of the endoplasmic reticulum. 5000x