Immunity
What is the body’s first line of defense? the skin
What kinds of cells attack foreign invaders? phagocytes
Where do immune system cells develop? in the bone marrow
What cells are used to stop bleeding? platelets
What makes pus? dead phagocytes and bacteria
What cells are used in defense after phagocytes die? macrophages
What cells are used to identify specific invaders? T cells
What cells produce antibodies? B cells
Where do T cells mature? in the thymus
What are antibodies made of? proteins