describe the structure of a muscle cell
1 Each muscle fibre ( muscle cell ) is covered by a plasma membrane sheath which is called the sarcolemma. 2  Tunnel-like extensions from the sarcolemma pass through the muscle fibre from one side of it to the other in transverse sections through the diameter of the fibre.ore about the contents of cells generally, is available on the page about animal cells. The components of skeletal muscle cells that are specific to muscle tissue are myofibrils. 1  Each muscle fibre ( muscle cell ) is covered by a plasma membrane sheath which is called the sarcolemma.