So, it depends on where you are living, but nearly every state has a Willed Body Program. I'm in Washington state and there is one at the University of Washington. We screen the application at the time of death, then if the decedent is accepted into the program our office goes out and does the removal to the UW. You have the option of getting some cremated remains back after they are done with the body. I believe that most states programs are similar You can google willed body programs and your state name to see if there is a program available there.
There is also donations to places like Med Cure (Oregon) and Science Care (Colorado).
Check in your area, google Med Cure and Science Care and get registered.
At the time of death, call which ever program you choose to go with and they will contact the local removal service to come and pick up. AFAIK there is no charge to the family, but that may be different from state to state.
Tissue/organ donation does not provide you with cremation, you will still need to contact a cremation provider/funeral home to cremate after the harvesting has taken place. Yep, we work with them as well.
Does this help?