T cell dependent B cell activation,computer artwork. Invading pathogens (round,small) are phagocytosed (engulfed) by macrophages,a type of white blood cell. Fragments of protein (antigen) from the pathogen are displayed on the macrophage's surface. The antigen is recognised by helper T lymphocytes (centre right),which secrete chemicals to activate other immune cells,including B lymphocytes (centre left). The B lymphocytes differentiate into plasma cells (large cells bottom right),which produce large numbers of antibodies (y-shaped) that recognise the antigen. The antibodies either neutralise the pathogen or flag it for destruction by other cells | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Kightley, Russell |
Bildgröße: | 5219 px × 6709 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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