SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY
Blood vessels. Coloured scanning electron micrograph (SEM) of blood vessels from the connective tissue of the penis. The vessels are wrinkled as a high degree of elasticity is required in the penis. This is a resin cast: the vessels were flooded with a resin that set hard, and then the surrounding tissue was eaten away chemically.
Model release not required. Property release not required.