STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Healing skin wound, coloured scanning electron micrograph (SEM). A blood vessel is leaking at left. At right, red blood cells (or erythrocytes, red) are becoming trapped in a mesh of the protein fibrin, which forms a clot. Fibrin is produced when blood is exposed to the air, and the clots it forms help to prevent blood loss. Magnification: x650 when printed 10cm wide.
Model release not required. Property release not required.