Final answer:
B cells and T cells are two types of lymphocytes that play different roles in the immune response. B cells produce antibodies, while T cells attack foreign or diseased cells. B cells mature in the bone marrow, while T cells mature in the thymus.
Step-by-step explanation:
B cells and T cells are two types of lymphocytes that play different roles in the immune response. B cells primarily function by producing antibodies, which are proteins that bind to antigens on pathogens. Once activated, B cells differentiate into plasma cells that secrete antibodies. On the other hand, T cells provide cellular-level immunity by physically attacking foreign or diseased cells. They can also stimulate other immune cells. Both B cells and T cells undergo maturation processes in different locations of the body, with B cells maturing in the bone marrow and T cells maturing in the thymus.