Have you ever wondered what's under your skin?

An exhibition touring the UK shows us just that - using the bodies of volunteers to peel back the skin to reveal the secrets of our internal organs, nervous system, muscles and lungs.

Professor Gunther von Hagen has developed a way of preserving bodies and body parts to allow medical examination of the human body in a way not previously possible.

Scientists have faced the problem of decaying bodies for many years. But Professor Hagen's plastination technique, which replaces body fats and fluids with polymers, allows morphologists to study bodies - right down to a molecular level.

Professor Hagen brought his exhibition to Sheffield University today. On display was one of his "bodies", as well as exhibits including the cross section of a lung and a preserved foetus.

If you missed the exhibition, take a look at our picture gallery. Please be aware that the specimens are created from real people and are anatomically correct. The pictures reflect this, and are not for the faint hearted.