Musculoskeletal system

• What surrounds the bundles of muscles?

  Perimysium
• What is the role of connective tissue/epimysium in muscles?

  It holds the bundles of muscle fibers together
• What shape do muscle cells have?

  Elongated cylinder
• What is contained within each muscle cell?

  A sarcolemma and sarcoplasm
• What are the threads found within the sarcoplasm called?

  Myofibril threads
• What are the two types of myofilaments?

  Myosin (thick) and actin (thin)
• What do myofilaments make up?

  Sarcomeres
• What is the structure of a muscle cell?

  • Elongated cylinder shape
  • Contains many nuclei
  • Surrounded by sarcolemma
  • Filled with sarcoplasm
• What is the relationship between myofilaments and sarcomeres?

  • Myofilaments (myosin and actin) are the components
  • Sarcomeres are the functional units made up of myofilaments