Thank you for asking this question in a public forum. It isn’t something that is always easy to think about. In the United States there are a few different options for end-of-life options, including whole body donation for medical research and education. I actually work for a whole body donation program, Science Care (www.sciencecare.com). Being in this industry, I can tell you that donation is an absolutely amazing gift and we are so grateful for the people who donate so generously.
One thing I will caution folks about is to make sure and do your research about whole body donation programs. We recommend only signing up with a program that holds to the highest quality and safety standards and, at the least, has been accredited by the American Association of Tissue Banks (AATB). Science Care was the very first whole body donation program in the United States to become accredited with the AATB. You can see the full list of accredited non-transplant tissue banks on their website: www.aatb.org.
Full disclaimer: I work for Science Care, the country's first accredited whole body donor program. www.sciencecare.com
What can be used by science to them, the rest I would prefer to be cremated. Not that I really care, I just really hate the thought of being buried alive..
Oh, and the Sedlec Ossuary in Kutna Hora is Catholic, not Jewish. :)