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Muscle (SMOOTH MUSCLE (Single central nucleus - Spindle shaped. Smaller…

- - - - surrounds a bundle of muscle fibers
    - - surrounds each muscle cell - direct contact w/muscle sarcolemma
    - - entire muscle
  - - - I band
        
        actin thin filaments
        
        Neubulin - Scaffolding binds to actin filaments and also insert into Z line
      - A Band
        
        Myosin filaments overlapping
        
        during contraction - only one that doesn't shorten
        
        Titin + A band to the Z line and M line
      - H Band
        
        Central part of the sarcomere - where myosin and actin don't overlap (middle of the sarcomere)
        
        M Band: Marks the middle of the sarcomere
  - - - Muscular dystrophies deplete pool of stem/satellite cells