Topical Terminology > Myofibril
1 Definition
Myofibril
For Myofibril we have a term and definition in Fitness.
Myofibril (Fitness) 
Myofibrils are very small fibers that run through each muscle fiber. The myofibrils have alternate light and dark bands, which contain protein filaments responsible for the muscle's contractile ability and give the muscle its typical striped appearance under the microscope.
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