There are different types of B cell and T cell. both are lymphocytes, a subclass of white blood cell. the T cells are mainly used in identifying antigens and releasing chemicals which attack macrophages (big immune cells which 'eat' antigens), to destroy the antigen. B cells are used in the antibodies. When they encounter a new antigen, plasma cells and memory cells are antibodies. Formed from the division of a B cell. the memory cell remembers the antigen and which antibody to use, while the plasma cell makes the antibodies to fight a particular antigen or class of antigens.
Hope this could help you with your question. : )
