Skeletal muscle

• • Myofibrils are located in the sarcoplasm, each myofibril is made up of two types of protein filament:
  • Thick filaments made of myosin
  • Thin filaments made of actin
  • These two types of filament are arranged in a particular order, creating different types of bands and line

  
• Sarcolemma - plasma membrane that surrounds the cell
• The sarcomere is the basic contractile unit of skeletal muscle tissue.
• T tubules - invaginations of the sarcolemma which run through the centre of the myofibrils
• A sarcomere consists of thick (myosin) and thin (actin) filaments which overlap at the centre of the sarcomere called the H zone.