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lymphocyte

   Also found in: Dictionary/thesaurus, Medical, Legal, Wikipedia, Hutchinson 0.01 sec.
lymphocyte: see blood blood, 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.
..... Click the link for more information. ; immunity immunity, 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.
..... Click the link for more information. .

lymphocyte

Enlarge picture
Human lymphocyte (phase-contrast microphotograph).
(credit: Manfred Kage—Peter Arnold)
Type of leukocyte fundamental to the immune system, regulating and participating in acquired immunity. Each has receptor molecules on its surface that bind to a specific antigen. The two primary types, B cells and T cells, originate from stem cells in bone marrow and travel to lymphoid tissues. When a B cell binds to an antigen, it multiplies to form a clone of identical cells. Some of these, acted on by helper T cells, differentiate into plasma cells that produce antibodies against the antigen. Others (memory cells) multiply, providing long-term immunity to the antigen.
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Extensive lymphocyte apoptosis has also occurred in humans and animals infected with several exotic agents, including Bacillus anthracis, the cause of anthrax; Yersinia pestis, the cause of plague; and Ebola virus.
Prevention of immune cell apoptosis as potential therapeutic strategy ... by Bray, Mike / Emerging Infectious Diseases
Mitogen-induced lymphocyte proliferation responses, lysozyme activity, and OC concentrations were measured from blood samples.
Effects of organochlorine contaminants on loggerhead sea turtle ... by Peden-Adams, Margie M. / Environmental Health Perspectives
Consequently, it has become possible to create immune recognition of cancer antigens through immunization and through adoptive transfer of antitumor lymphocytes into a lymphodepleted host.
Advances in cancer immunotherapy by Sataloff, Robert T. / Ear, Nose and Throat Journal
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