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![[-- lymphocyte --]](Images/Terms/lymphocy.gif){kind=small}
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| defined: |
A small white blood cell that plays a major role in defending the body against disease. There are two main types of lymphocytes: B cells, which make antibodies that attack bacteria and toxins, and T cells, which attack body cells themselves when they have been taken over by viruses or become cancerous.
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| explained: |
Listen to a detailed explanation.
Dr. Jennifer Puck, of the National Human Genome Research Institute's Genetics and Molecular Biology Branch, defines lymphocyte. |
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related terms: |
cancer, cell | |
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