Types
of White Blood Cells
•Phagocytes (Macrophages): Eat pathogens by endocytosis and present antigens to other white blood cells.
•B lymphocytes:
–Produce antibodies
•T lymphocytes:
–Helper T cells: help activate B cells and “killer” T cells
–Killer T cells: destroy infected
cells.
•Memory Cells
–B or T cells that “remember” the antigen.
–Why you don’t get sick twice by the
same germ
