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contractile functional unit of the skeletal muscle, extends from one z-disk to another
sarcomere

thin myofilament

thick myofilament

red
actin

green
troponin

yellow
tropomyocin

blue
myocin

z- line

m-line

only contains thick filaments = striations
h-zone

myofiber

cell membrane
sarcolema

connective tissue layer that traps the entire muscle fiber
indomycium