Blood cells and bacteria. Coloured scanning electron micrograph (SEM) of Staphylococcus aureus bacteria (yellow,round),a lymphocyte (white blood cell) and an erythrocyte (red blood cell). Lymphocytes are part of the body's immune system. There are three types of lymphocyte,B cells,T cells and natural killer cells. B cells produce antibodies that bind to pathogens to signal that they should be destroyed,helper T cells coordinate the immune response and cytotoxic T cells and natural killer cells kill body cells that have become infected with a pathogen | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Berger, Juergen |
Bildgröße: | 2048 px × 2048 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |