Immune System

antibody

pathogen

enzyme

hormone

Y-shaped protein

eat

chemical marker

medicine

foreign invader

This pathogen has 2 different antigens on its surface.

An antibody's binding site must match shape of antigen.

Phagocyte engulfing a pathogen.

Only antibody A will bind to the antigens on this pathogen.

This is made from a weakened form of a pathogen.

1--the antibody

2--the antigen

3--the pathogen

red blood cells will be prevented from carrying oxygen.

antibiotics will be produced that cause blood clotting.

white blood cells will react to the foreign antigens on the organ.

the organ prevents antibodies from being made.

chemical markers on pathogens

important cells in our immune system

substance that protects against disease

any living organism that can cause disease

made by white blood cells to fight pathogens

They are Y-shaped proteins.

They are made by the immune system.

They can attack any antigen that enters the body.

They remain in the bloodstream for a long time after they are produced.