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B淋巴细胞简称B细胞,是来源于骨髓的多能干细胞,其受抗原刺激后会增殖分化出大量浆细胞。在血液中循环浆细胞可合成和分泌抗体。成熟的B细胞经外周血迁出,进入脾脏、淋巴结,主要分布于脾小结、脾索及淋巴小结、淋巴索及消化道黏膜下的淋巴小结中,受抗原刺激后,分化增殖为浆细胞,合成抗体,发挥体液免疫的功能。B细胞的细胞膜上有许多不同的标志,主要是表面抗原及表面受体。这些表面标志都是结合在细胞膜上的巨蛋白分子,B1细胞为T细胞非依赖性细胞、B2为
B lymphocytes, referred to as B cells, are bone marrow-derived pluripotent stem cells that proliferate and differentiate into large numbers of plasma cells upon antigen stimulation. Circulating plasma cells in the blood can synthesize and secrete antibodies. Mature B cells migrate through the peripheral blood into the spleen and lymph nodes, mainly distributed in the splenic nodules, splenic cord and lymph nodes, lymph nodes and lymph nodes in the digestive tract submucosa. After being stimulated by the antigen, the mature B cells differentiate and proliferate into plasma cells, Synthesis of antibodies, play a humoral immune function. There are many different signs on the cell membrane of B cells, mainly surface antigens and surface receptors. These surface markers are megalin molecules that bind to the cell membrane, B1 cells are T cell-independent cells, and B2 is