Plasma cells - Definition

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Plasma cells, also called plasmocytes, are a type of white blood cell, or leukocyte. These cells play a role in the production of antibodies, virus-neutralizing proteins, bacteria, parasites, and other foreign bodies in the system. Plasma cells can be found in the blood, but only temporarily when the body is under attack. Most of the time, they remain in the lymphatic organs, particularly the many lymph nodes distributed around the body, but also in the spleen.