Immune System

macrophages, T lymphocytes, and B lymphocytes

to alert T cells of the presence of bacteria

directly attack cells infected by bacteria

target specific bacteria for destruction

Antibody mediated - response is to an antigen Cellmediated - when response is to an already infected cell

to help the body remember previous pathogens, and counterattack even stronger the 2nd time

red bone marrow

monocytes, T lympocytes, B lymphocytes, granulocytes, natural killer cells

larges, longest living phagocyte that engulfs and destroys pathogens

present antigens to the T cells

short living phagocytes that repsond quickly to invaders

alert the body of invasion

large, long living phagocytes that defend against multicellular invader

T killer cells, T helper cells, T suppressor cells, and T memory cells

destory cells that are infected with a virus, tumor or pathogen

to stop or suppress the other T cells when the battle is over

help the body fight infections by producing antibodies and other chemicals

remain in the blood to alert in case the invader attacks again

produce antibodies

a pathogen enters the body and is engulfed by a macrophage, a helper T cell joins that macrophage. The killer T cells and B cells are activated. killer T cells search out and destroy cells presenting the same antigens, B cells afterwards differentiate into plasma cells and memory cells

produce antiboides specific to that pathogen or foreign substnace