Not sure i know about that. Jars of fetuses at incremental stages of development just gross me out, but my babies ultrasounds (especially with the sound) were awesome.
I was an EMT in the USCG (mk3) and did some ugly stuff, but the grossest thing I ever did was cut my #2 daughters umbilical cord. I cut the remaiming flesh off a guys arm with my pocket knife so i could transport him off a fishig boat, and that wasn't as nasty.
It's new.
http://www.bodyworlds.com/index.html