Humoral Immunity

Foreign antigen on bacterial cell

Engulfed

B cell APC

Clonal selection. T helper cell

Interleukins produces

Clonal expansion of B cell

B cell APC

Plasma Cell

B memory cell

Makes anitibodies

If second infection, quickly stimulates more plasma cells to be made

Act as opsonins (phagocytes alerted)

Agglutination (stick antigens together)

Produce antitoxins

Bind and disable antigens