Labels:hakham | web site OCR: ANTIGEN NTIGENS are chemical substances that stimulate response from the body's defense system Potentially harmful organisms that enter the body, such as bacteria and viruses carry antigens in the form of identify ing markers on their outer surfaces. W hen they enter the body the antigen markers are recognized by the body defense system as being foreign The body then produces antibodies in response. Antibodies are chemicals that target and then neutra lize the organisms mark
(Dorling Kindersley).iso/glb1/anti000g.png){kind=small}