cells of the immune system

First a little about the types of white blood cells (called leukocytes):

a. macrophages - phagocytic

b. eosinophils - phagocytic

c. neutrophils - phagocytic

d. basophils - release histamine; involved in the inflammatory response.

e. lymphocytes - 3 types: B cells, T cells and Natural Killer cells.

(Be careful not to get the terms leukocyte and lymphocyte confused!)