Mast cell, TEM

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Mast cell, TEM

Mast cell. Transmission electron micrograph (TEM) of a section through a mast cell, with vacuoles (black) containing histamine or heparin. A mast cell is a leucocyte (white blood cell) that contains the chemical mediators histamine, serotonin and heparin. It is part of the immune system, and releases its contents during a localized inflammatory immune response to invading pathogens and during an allergic reaction. Histamine and serotonin cause the symptoms of allergies. Heparin is an anticoagulant which prevents abnormal clotting. Magnification: x7700 when printed at 10 centimetres across

Science Photo Library features Science and Medical images including photos and illustrations

Media ID 9241037

© SECCHI-LECAQUE/ROUSSEL-UCLAF/CNRI/SCIENCE PHOTO LIBRARY

Blood Cell Biology Cellular Haematological Haematology Heparin Histamine Histological Histology Immune Response Immune System Immunological Immunology Inflammation Inflammatory Leucocyte Mast Cell Microscope Serotonin Tissue Transmission Electron Transmission Electron Micrograph Vacuole Vacuoles White Blood Cell Circulation Circulatory System Section Sectioned

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