Cell Mediated Immunity

Antigen Presenting Cell

T helper cell binds to antigen (e.g cancer cell antigen)

Produces interleukins (type of cytokine) (chemical transmitter)

When a T helper cell finds and binds to the correct APC it is called Clonal Selection

Stimulate phagocytosis. (more phagocytes)

T killer cells

Perforins (perforate holes in the membranes of infected cells.

Stimulates more of the correct T helper cells. Clonal expansion.

Production of B lymphocytes

Humoral immunity

T memory cells. (Quickly stimulate more T killer cells if there is another infection).