For those who need it -- there is no substitute. But a display of plasticized bodies is not a dissection; it's something between art and education and science (and maybe a little macabre-ness).As a science teacher and a student who has actually taken part in a full human dissection, I can say that nothing really beats the real thing when it comes to really knowing anatomy. These kinds of exhibits are a wonderful opportunity for the average person to see the reality of one's own insides. My only concern are the ethics involved in the display of the bodies. The persons or the families need to agree to this or it crosses a line for me.
One thing that I am wondering, for those of you who are against shows like this, how else do you think a normal person could go and see a real cadaver dissection if they would like to learn about it? Is there any appropriate way to display a dead body so that normal people can study it?