limb muscle
Limb muscle of an E18.5 mouse embryo

 

Ghost fiber
Muscle stem cells (green) and macrophages (red) working together to rebuild damaged myofibers within the basement membrane remnants (gray), known as ghost fibers, after muscle injury.

 

myoblast fusion
Let's fuse to make giants–myoblast fusion into myotubes in a culture dish.
MyoD
Myoblast fusogenic synapse–where the two fusion partners meet.