Levels of Organization of Muscle Fiber
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muscle fiber
muscle cell
Myofilaments
filaments of myofibrils, constructed from proteins, principally myosin or actin
epimysium
surrounds entire muscle
Myosin
thick filament
Actin
thin filaments
fascicle
bundle of muscle fibers
skeletal muscle
A muscle that is attached to the bones of the skeleton and provides the force that moves the bones.
perimysium
Connective tissue surrounding a fascicle
endomysium
Connective tissue surrounding a muscle fiber
tendon
Connects muscle to bone
Sarcomere
a structural unit of a myofibril in striated muscle, consisting of a dark band and the nearer half of each adjacent pale band.
Sarcolemma
plasma membrane of a muscle fiber
Myofibrils
protein structures that make up muscle fibers
