Lymphocyte, SEM

Bildnummer 12489905
Lymphocyte, SEM
Lymphocyte white blood cell. Scanning electron micrograph (SEM). Its surface is covered in characteristic microvilli. Lymphocytes are divided into either B-cells or T- cells. B-cells mature in bone marrow and are responsible for humoural immunity; they operate by recognising a specific site on the surface of a pathogen or foreign object (antigen), which they then bind to before producing antibodies to destroy that antigen. T-cells mature in the thymus and are involved in cell-mediated immunity, which does not rely on antibodies to fight antigens, but rather the activation of macrophages, NK-cells, cytotoxic T-lymphocytes and various cytokines. Magnification: x6000 when printed at 10 centimetres wide
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / Gschmeissner, Steve
Bildgröße: 4572 px × 4330 px
Modell-Rechte: nicht erforderlich
Eigentums-Rechte: nicht erforderlich
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