Our bodies are our individual property. In a sense, bodily ownership is the most fundamental kind of ownership we know. It is the core experience or our being.
That is why when an individual donates tissue to a doctor of a research study, is is not the same as donating a book to a library. It never will be. If the doctor or his research institution wishes later to use tht tissue for some other purpose, they should be required to obtain permission for this new use. And so on, indefinitely.
Because the descendants of a dead person share his or her genes, their privacy is invaded if research is done, or if the genetic makeup of the dead person is published. The children of the dead person may lose their health insurance simply because contemporary laws do not reflect contemporary realities.