Immune system and bacteria, artwork

Immune system and bacteria, artwork

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Credit: HENNING DALHOFF / SCIENCE PHOTO LIBRARY

Caption: Immune response to bacteria, artwork. Invading bacteria (yellow) are phagocytosed (engulfed) by macrophages, a type of white blood cell. Fragments of protein (antigen) from the bacteria are displayed on the macrophage's surface. The antigen is recognised by helper T lymphocytes, which secrete chemicals such as cytokines (pink dots) to activate other immune cells, including B lymphocytes. The B lymphocytes differentiate into plasma cells, which produce large numbers of antibodies (orange) that recognise the antigen. The antibodies either neutralise the pathogen or flag it for destruction by other cells.

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Keywords: activating, activation, anatomy, antibodies, antibody, artwork, b cell, b lymphocyte, biological, biology, cell mediated immunity, cells, computer artwork, defence, human body, humoral immunity, illustration, immune response, immune system, immunology, infection, lymphocyte, lymphocytes, macrophage, macrophages, nobody no-one, pathogen, plasma cell, t cell, t cell dependent activation, t dependent activation, t lymphocyte, wbc, wbcs, white blood cell

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