Reference Article

from Wikipedia, the free encyclopedia

T cell

T cells are a subset of lymphocytes that play a large role in the immune response.

The abbreviation "T" stands for thymus, the organ in which their final stage of development occurs.

Every effective immune response involves T cell activation; however, T cells are especially important in cell-mediated immunity, which is the defense against tumor cells and pathogenic organisms inside body cells.

Note: This article excerpts material from the Wikipedia article "T cell", which is released under the GNU Free Documentation License.

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