the satellite cells exhibited the following successive changes : ( 1 ) cells enlarged and became freed of connective network sheath , ( 2 ) cell distance from the associated fibers increased though still attached to the latter , ( 3 ) subsequent cell division , giving rise to rows of cells , that with time-lapse formed elongated structures with a common sheath , ( 4 ) elongated structures developed into new muscle fibers .
C0007590
cell division
C0007634
cells