It's easy (and expensive) to have very realistic dead bodies for autopsies, experiments, accident and hospital scenes.  When I needed to come up with eight bodies for one scene, we decided to mix-n-match... use the quality ones in the foreground and get less expensive ones for deeper in frame.  All it takes is a little cooperation and strategic placement of autopsy sheets.

I've used bodies from Andrew at Creative Character Engineering, Vincent Van Dyke, Matthew Mungle and Dapper Cadaver, among others.

For an autopsy scene on The Kominsky Method, I needed Morgan Freeman (playing Quincy, MD) to get through some complicated action. It takes some choreography (and a good MUFX team… again, Vincent Van Dyke’s team) to allow an actor to cut through connective tissue, remove a heart, then go into the body cavity again to retrieve a bullet. Dulled scalpels, sharp scalpels, bullets pre-set in forceps and hidden within the folds of the cadaver…