B-cell definitions

Any of the lymphocytes that when stimulated by a particular antigen differentiate into plasma cells and that in mammals mature in the bone marrow.
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Any of the lymphocytes not derived from the thymus, that mature in the bone marrow and help to build antibodies.
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Any of a class of lymphocytes that, when activated by a specific antigen and usually also by helper T cells, proliferate and differentiate into antibody-secreting plasma cells or memory cells. In mammals, B cells mature in the bone marrow.
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Any of the lymphocytes that develop into plasma cells in the presence of a specific antigen. The plasma cells produce antibodies that attack or neutralize the antigen in what is called the humoral immune response . B cells mature in the bone marrow before being released into the blood.
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(immunology) A lymphocyte, developed in the bursa of birds and the bone marrow of other animals, that produces antibodies and is responsible for the immune system.
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Origin of b-cell

b(ursa-dependent) cell after the bursa of Fabricius a gland in birds where the cells mature and the first such tissue found in vertebrates