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Mast cell, TEM

Mast cell, TEM

P266/0151

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Credit

MEDIMAGE / SCIENCE PHOTO LIBRARY MEDIMAGE / SCIENCE PHOTO LIBRARY

Caption

Mast cell, coloured transmission electron micrograph (TEM). Mast cells (mastocytes) are a type of white blood cell (leukocyte) found in connective tissue. The large oval (pink and brown) is the cell's nucleus, which contains its genetic information. Within the cell's cytoplasm (green) are granules (brown) containing chemical mediators, including histamine and heparin. When the mast cell is activated, either by an allergic reaction or in response to injury or inflammation, these granules are released into the tissues. Histamine is responsible for the symptoms of an allergic reaction, such as itching, and heparin prevents blood from clotting. Magnification: x6,700 when printed at 10 centimetres wide.

Release details

Model release not required. Property release not required.

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