white cells involved in the immune response. B lymphocytes are so called because they mature in bone while T lymphocytes mature in the thymus. Both cells look alike until they recognise a foreign antigen. The B cell starts to make antibodies while the T lymphocytes accumulate vesicles loaded with cytotoxic agents. On contact with a foreign cell, th...
White blood cells that fight infection and disease. ... (12 Dec 1998) ... 
A type of white blood cell that is part of the immune system.
(Humans as organisms) white blood cells which attack pathogens by producing antibodies
White blood cells formed in lymphatic tissue
a type of white blood cell involved in the body's immune defense system. There are a few different kinds of lymphocytes: the natural killer cells (NK cells), the T cells, and B cells
Small white blood cells that help the body defend itself against infection. 
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.
White blood cells that arise in the bone marrow and mediate the immune response; include T cells and B cells.
immune system cells that identify and destroy foreign agents such as viruses, bacteria and parasites.
Cells that contribute to the immune response of the body. Originally produced in the bone marrow, the ones that remain and mature there are known as B-Lymphocytes and eventually become B cells. The ones that migrate to and mature in the thymus are known as T-lymphocytes and become T cells.
small white blood cells that help the body defend itself against infection. These cells are produced in bone marrow and develop into plasma cells, which produce antibodies. Also known as B cells.
part of the lymphatic system; white blood cells that fight infection and disease.