Resting T lymphocytes. Coloured scanning electron micrograph (SEM) of resting T lymphocytes from a human blood sample. T lymphocytes, or T cells, are a type of white blood cell and components of the bodys immune system. They mature in the thymus. T lymphocytes recognise a specific site on the surface of pathogens or foreign objects (antigens), bind to it, and attract antibodies or cells to eliminate that antigen. Specimen courtesy of Professor Greg Towers, University College London. Magnification: x3000 when printed at 10 centimetres wide.
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Creative#:
TPG35254026
Source:
達志影像
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RF
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