Saw this at the Bodies Exhibit. Blood vessels are injected with a formula that hardens them like plaster, then they literally soak the organ in acid so everything is eaten away except for the vessels. What's left is amazing!
The Corpus Museum offers its guests an excursion through the human body during which they can see, feel, and hear how the body works. The building, designed by architect Wolbrand van der Vis of PBV Architecten, even has a 5D-heart theater where you, the audience, are a red blood cell. The journey begins at the knee and continues through the uterus (I guess it’s a woman then), the stomach, intestines, the mouth, and finally ending in the brain.
Nervous System. Gunther von Hagens' often-controversial "Body Worlds and the Mirror of Time" exhibition shows us just how many nerves cover the face and head of a human. The exhibit demonstrates the various systems and functions of the human body.