I happen to have some experience with this, as I used to teach anatomy at university. Many of the corpses that we used, contained metal knees, and other improvements, you can, for instance, clearly see where open heart surgery was used to improve the heart. Now, all these corpses have been soaked in alcohol and formaldehyde to conserve them, so they are obviously dead. A few times however, the olde pumpe may start beating again, if it has artificial components. We tutors laughed our toupees off, as students would get the shock of their lives, when the corpses would sit up, or even chase them across the room!