STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Placental villi. Coloured scanning electron micrograph (SEM) of a freeze fracture through a placenta showing a blood vessel and erythrocytes (red blood cells). The placenta surrounds the foetus in the womb. It provides the foetus with nourishment, eliminates waste products and exchanges respiratory gases.
Model release not required. Property release not required.