Type of white blood cells that are part of the immune system. They are found in the lymph nodes where they help to fight infection. They swallow up and kill foreign cells, including cancer cells.
Specialized white blood cells that play many roles in the immune response, including engulfing and digesting bacteria and other microbes, alerting other immune cells, and producing chemicals needed for immune responses to disease threats
The soldiers of the immune system that are ordered by T-lymphocytes to attack and destroy foreign invading microbes and tumor cells that develop within our own body.