Weird little cartoon from the good old days of Sesame Street with a man examining his bones.
While I haven't been able to narrow it down, I can tell you this was animated by Bruce Cayard and/or Mike Christy (aka ArtistMike) and/or John Canemaker. The voice is John Stephenson.
For more goodies, see my site, The Sesame Street Lyrics Archive. Enjoy!