HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY
Leukaemia blood cells. Light micrograph of blood cells in a blood smear from a patient with acute lymphatic leukaemia. The large, dark pink cells are white blood cells, while the smaller, pale pink cells are red blood cells. Leukaemia is a cancer of the white blood cells, leading to an increase in their number. It is termed acute when the onset of the disease is sudden, compared to the long-term chronic forms. Lymphatic leukaemia affects the lymphatic system, such as the lymph glands, and the white blood cells known as lymphocytes. Magnification: x485 when printed 10cm wide.
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