I have a 3D scan of human leg I want that to convert into the assembly of the different parts, can that be done?
The STL file contains 55 shells. Those can be pretty easily split and saved as 55 individual stl files.
Loading an stl into solidworks is almost useless, but if you enable the Scan to 3D add-in, it will work better. But SolidWorks is not great at wrapping surfaces around a mesh model.
I've attached a step file for one of the leg bones. You can check it out and see if it would work for you.
If all of the files are eventually converted, someone is going to have a hell of a time reassembling each of the pieces in an assembly. I'd anticipate a lot of work.