<prompt> Which is not a feature of Skeletal muscleSpindle shaped fibresSyncytiumStriationsHypolemmal nucleus  <response>: Microscopic Features of skeletal muscles - Skeletal muscle is made up essentially of long, cylindrical fibres. The length of the fibres is highly variable, the longest being as much as 30 cm in length. The diameter of the fibres also varies considerably 10-60 um; usually 50-60 um. Each fibre is really a syncytium with hundreds of nuclei along its length The fibre is formed, during development, by fusion of numerous myoblasts. The nuclei are elongated and lie along the periphery of the fibre, just under the cell membrane which is called the sarcolemma. The cytoplasm or sarcoplasm is filled with numerous longitudinal fibrils that are called myofibrils. The most striking feature of skeletal muscle fibres is the presence of transverse striations in them. REF : Inderbir Singhs Textbook of Human Histology, seventh edition, pg.no., 108, 109. 