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Hela cell, SEM
HeLa cell. Coloured scanning electron micrograph (SEM) of a HeLa cell grown in a 3D matrix (background). HeLa cells are a continuously cultured cell line of immortal human cancer cells derived from cervical cancer cells. As they are immortal they thrive in the laboratory and are widely used in biological and medical research. Cancer of the cervix (the neck of the uterus) is one of the most common cancers affecting women. Magnification: x4000 when printed at 10 centimetres wide., by STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
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