STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Crenated red blood cells. Coloured scanning electron micrograph (SEM) of a section through an arteriole (small blood vessel), showing crenated red blood cells inside. Crenation is caused by dehydration, which distorts the cell. Magnification: x1650 when printed to centimetres wide.
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