Wow, spider webs! It would be interesting to know if the nerves reconnected. I’m pretty amazed that his body was able reestablish the blood supply to the tip quickly enough to keep it alive.
Elsewhere in this thread I posted references (but not links) to the Soviet experiments (first of keeping a severed dog’s head alive on artificial heart and lungs, then of grafting one dog’s head and paw to another living dog, both breathing and eating from the same dog’s throat, lungs, heart).