STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
HeLa cell, coloured scanning electron micrograph (SEM). HeLa cells were the first continuously cultured human cell line. They were cultivated in 1952 from a cancer of the cervix of Henrietta Lacks (after whom the cells are named) who later died of cervical cancer. Like almost all cancerous cells they are immortal and so thrive in the laboratory. However, that are also poorly differentiated and lack some of the characteristics of normal cells, such as the proteins that build the junctional complex between cells. Magnification: x2250 when printed at 10 centimetres wide.
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