I think it was called Jintai, Mysteries of the Human Body. Here is a link to an article written a couple of years ago about this.
If you're interested, take either a JR or a Keikyu Train to their respective Kawasaki stop and head to the 0101 building. Tickets are available for purchase for 1500-yen, less if you print out a coupon from their web site, on the 2nd floor. Head up to the 4th floor and enjoy all the body parts.