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canvas prints plasma cell canvas prints b cell canvas prints t cell canvas prints macrophage canvas prints t lymphocyte canvas prints b lymphocyte canvas prints pathogen canvas prints antibody canvas prints lymphocyte canvas prints white blood cell canvas prints human body canvas prints activating canvas prints biology canvas prints immunology canvas prints black-and-white canvas prints

photographs plasma cell photos b cell photos t cell photos macrophage photos t lymphocyte photos b lymphocyte photos pathogen photos antibody photos lymphocyte photos white blood cell photos human body photos activating photos biology photos immunology photos black-and-white photos

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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.

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