Final answer:
Adaptive immunity is orchestrated by two different classes of a type of white blood cell called lymphocytes - T cells and B cells. T cells neutralize virus-infected cells, while B cells produce antibodies that bind antigens to remove pathogens.
Step-by-step explanation:
Adaptive immunity, which is a part of the body's third line of defense, is orchestrated by two different classes of a type of white blood cell called lymphocytes. There are two main types of lymphocytes involved in adaptive immune responses, called T cells and B cells. T cells play a role in the cell-mediated immune response by neutralizing virus-infected cells, while B cells give rise to and secrete antibodies that bind with antigens to remove pathogens.