The British investigators know what butchers have long known: If you want people to feel comfortable about dead bodies, cut them into pieces. A cow carcass is upsetting; a brisket is dinner. A human leg has no face, no eyes, no hands that once held babies or stroked a lover's cheek. It's difficult to associate it with the living person from which it came. The anonymity of body parts facilitates the necessary dissociations of cadaveric research: This is not a person. This is just tissue. It has no feelings, and no one has feelings for it. It's okay to do things to it which, were it a sentient being, would constitute torture.