Skeletal muscle fibre

• Sarcolemma is a cell membrane of a striated muscle cell.
• Myofibrils are basic rod-shaped units of muscle cell.
• In a muscle the cells will join up to make the muscles fibres.
• In the muscle cell cytoplasm there are many mitochondria, sarcoplasmic reticulum and microfibrils.
• Each muscle fibre is surrounded by a cell surface which is known as the sarcolemma.
• This muscle will appear stripy under a microscope.
• Each muscle fibre is made up if myofibrils.
• Myofibrils appear in different colour bands.
• A-bands are dark.
• I-bands are light.