A small white blood cell (leukocyte) that plays a large role in defending the body against disease. Lymphocytes are responsible for immune responses. There are two main types of lymphocytes: B-cells and T-cells. The B-cells make antibodies that attack bacteria and toxins while the T-cells attack body cells themselves when they have been taken over by viruses or have become cancerous. Lymphocytes secrete products (lymphokines) that affect the functional activities of many other types of cells and are often present at sites of chronic inflammation.
a subset of white blood cells. These small cells with a round and voluminous nucleus are involved in specific aspects of immune reactions. There are two categories of lymphocytes: B lymphocytes (that secrete antibodies) and T lymphocytes.
Cells of the immune system that respond specifically to foreign antigens. There are two classes of lymphocytes: B-lymphocytes (B-cells) and T-lymphocytes (T-cells). They are found in blood, lymph, and lymphoid tissues. B-cells become memory or plasma cells. T-cells differentiate into several types: helper (CD4 T-cells); suppressor (CD4 and CD8 T-cells); cytotoxic (CD4 and CD8 T-cells); and memory (CD4 and CD8-T-cells).
Lymphocytes in the blood are a mixed population of B-cells and T-cells. They are the major cellular component of immunity in the body. B-lymphocytes synthesize antibodies that are responsible for humoral immunity. T-lymphocytes are the principal component of cellular immunity. Lymphocytes also participate in immune regulation and surveillance, and some are cytotoxic.
Type of white blood cell. There are two types of lymphocytes, B lymphocytes and T lymphocytes. They are part of the body's defense against disease, the immune response. B lymphocytes produce antibodies, helped by T lymphocytes.
Any of the nearly colorless cells formed in lymphoid tissue, as in the lymph nodes, spleen, thymus, and tonsils, constituting between 22 and 28 percent of all white blood cells in the blood of a normal adult human being. They function in the development of immunity and include two specific types,B cells and T cells.
A class of white blood cells, produced in the lymphoid tissue, and playing various roles in the immune system. For a detailed discussion of their function in the immune system, refer to http://gsbs.utmb.edu/microbook/ch001a.htm.
Small (mononuclear) white blood cells which signal the start of antibody formation and call on other cells during inflammatory reactions. An important part of the body's immune system. Is damaged in immune deficency disorders.
A type of white blood cell. Three important kinds of lymphocytes are T-cells, B-cells, and Natural Killer Cells. T-cells attack and destroy virus-infected cells, foreign tissue and cancer cells; B-cells produce antibodies that help destroy foreign substances; Natural Killer cells destroy cancer cells and virus-infected cells.
White blood cells that fight infection and disease. lymphocyte proliferation test (LPT, BeLPT): A blood test to determine how white blood cells (lymphocytes) react to beryllium. A strong response may indicate the onset of disease. P - Z
Small white cells, normally present in the blood and in lymphoid tissue, that bear the major responsibility for carrying out the functions of the immune System. There are two major forms of lymphocytes, B-cells and T-cells, which have distinct though related functions in generating an immune response.
small white blood cells that are critical components of the immune system. There are several types of lymphocytes: B cells are primarily involved in the production of antibodies; T cells release chemicals that activate and direct the movements of other cells to help fight infection or attack foreign matter.
these blood cells are the main cells that make up lymphoid tissue, a major part of the immune system, and are found in the lymph nodes, thymus, spleen, tonsils, adenoids, bone marrow, and throughout the digestive and respiratory systems. The two types of lymphocytes are known as B lymphocytes (B cells) and T lymphocytes (T cells)
A sort of white blood cell that helps fend off foreign cells and other objects that have "invaded" the body. It's the lymphocytes that sometimes cause a body to reject a transplanted organ, for instance, and they're sometimes responsible for allergic reactions as well.
Sub-group of the white blood corpuscles that assist in the combating of illnesses and foreign substances, with the two sub-types B-lymphocytes and T-lymphocytes. Only a small portion of the lymphocytes are found in the blood, the remaining lymphocytes are found in the lymphatic organs (such as thymus gland and spleen), where they multiply.
Two classes of white blood cells that can recognize foreign molecules (antigens) and mediate immune responses. B lymphocytes are responsible for production of antibodies; T lymphocytes are responsible for destroying virus- and bacteria-infected cells, foreign cells, and cancer cells.