TEM of a plasma cell from guinea pig bone marrow

TEM of a plasma cell from guinea pig bone marrow

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Credit: DON FAWCETT/SCIENCE PHOTO LIBRARY

Caption: Transmission electron micrograph of a plasma cell from guinea pig bone marrow. Plasma cells are mature B- lymphocytes (white blood cells), which synthesise & secrete the antibodies of the immune system. On contact with an antigen, B-lymphocytes transform into plasmablasts first & later plasma cells. Characteristic of a plasma cell is the arrangement of heterochromatin (black) in the nucleus, which adheres to the inner nuclear membrane. Typical also is the network of dilated rough endoplasmic reticulum (filaments) in the cytoplasm, where protein (antibody) synthesis occurs. When active, these membranes are swollen. Magnification: x25,000 at 10x8 inch size.

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Keywords: anatomy, animal body, antibody production site, b-lymphocyte, cells, endoplasmic reticulum, heterochromatin, mature, plasma cell, rough, rough endoplasmic reticulum, white blood cell

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