Painting anatomy on anatomy.

Painting anatomical features on a model's skin to delineate internal structures is a medical illustration technique that rarely has been used. Yet it seems to have potential where the scientific point involves muscles, tendons, nerves, blood vessels, bones and other tissues that either produce an external configuration on the body surface or lie directly underneath. These structures can be given clarity and vividness with various paints and pigments that are appropriate and safe for applying to human skin.