How the no. myofilaments increase inside our body?

Dear student,
Myofilaments form myofibrils which are made up of proteins myosin and actin. The number of myofilaments increases by either causing some injury in the muscle fibres or by carrying out exercise. Satellite cells which are the stem cells of muscle fibres divide and differentiate to form other stem cells and new muscle fibres. During exercise cells get damaged which is repaired by satellite cells forming new cells.


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