While not applicable to his immediate plans, the master has discovered that thoughtful removal of certain anatomy prior to reanimation cultivates a stronger, more versatile specimen.
Most internal organs no longer serve any function and only encumber the cadaver, and while the skin can offer some protection, it often becomes host to rot that spreads to more useful tissues.
Ligaments and muscle, on the other hand, greatly increase durability, stability, and mobility provided that they remain undamaged.
This may explain why the draugr guardians of the Dragon Priests were mummified before reanimation.
