lymphocyte(redirected from CD4 T l)
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fluid pumped by the heart that circulates throughout the body via the arteries, veins, and capillaries (see circulatory system; heart). An adult male of average size normally has about 6 quarts (5.6 liters) of blood.
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ability of an organism to resist disease by identifying and destroying foreign substances or organisms. Although all animals have some immune capabilities, little is known about nonmammalian immunity.
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An agranular leukocyte formed primarily in lymphoid tissue; occurs as the principal cell type of lymph and composes 20-30% of the blood leukocytes.
a type of white blood cell formed in lymphoid tissue