JEAN BONHOMME, ISM / SCIENCE PHOTO LIBRARY JEAN BONHOMME, ISM / SCIENCE PHOTO LIBRARY
Leukaemia blood cells. Light micrograph of blood cells in a bone marrow smear from a patient with 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. Lymphatic leukaemia affects the lymphatic system, such as the lymph glands, and the white blood cells known as lymphocytes. The bone marrow contains the stem cells that differentiate into the different blood cells. Magnification: x500 when printed 10cm wide.
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