Lymphocyte Response
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1. Lymphocytes develop from stem cells in the bone marrow, and during fetal development, immature, undifferentiated lymphocytes are released from the bone marrow into the blood (Applegate, 2000, 295-296). Some of these cells go to the thymus gland, where they acquire the ability to distinguish between self and non-self and differentiate into T-lymphocytes. Differentiated T-cells leave the thymus and are carried by the blood to lymphoid tissues. Roughly 70 percent of circulating lymphocytes are T cells. T cells are responsible for cell-mediated immunity during which the T cells directly attack the invading antigen. Cell-mediated immunity is effective against virus-infected cells, cancer cells, foreign tissue transplants, fungi and protozoan parasites. The antigen is phagocytized by a macrophage on entering the body and presented
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Some common words found in the essay are:
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Approximate Word count = 564
Approximate Pages = 2 (250 words per page)
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