Mast Cell #1
by Secchi-lecaque/roussel-uclaf/cnri/science Photo Library/science Photo Library
Title
Mast Cell #1
Artist
Secchi-lecaque/roussel-uclaf/cnri/science Photo Library/science Photo Library
Medium
Photograph - Photograph
Description
Mast cell. Coloured transmission electron micrograph (TEM) of a section through a mast cell, with vacuoles (dark) 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.
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February 17th, 2021
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