DAVID SCHARF / SCIENCE PHOTO LIBRARY DAVID SCHARF / SCIENCE PHOTO LIBRARY
Lymphocyte white blood cell. Coloured scanning electron micrograph (SEM) of a lymphocyte white blood cell. Lymphocytes are involved in the immune system's defence mechanisms, lymph system, and involved in antibody production. Magnification: x4213, when printed 10 centimetres wide.
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