Well years ago when I was with a friend who was a medical student, at his University, he showed me around, he took me into this room, well in this room were many glass containers filled with preserving fluid and parts of people inside, like a dissected head, they were labeled with a name and a date when the specimens were placed in the container, well some were around 20 years old and he told me when they reach a certain age, they give the specimens a ceremony and they get cremated.