Matching Pairs The Immune SystemOnline version Play this game! by EMILY LECKNER 1 pathogen 2 1st Line of Defense 3 T Cells 4 2nd Line of Defense 5 Types of Pathogens 6 B Cells 7 The Inflammatory Responses 8 Antibodies 9 3rd Line of Defense Produce antibodies to destroy pathogens An organism that causes disease Chemicals that lock onto the antigen of a pathogen and mark it Recognizes the different pathogens by their antigens Pain, redness, swelling and warmth The Inflammatory Response Bacteria, viruses, fungi, and protozoa The skin, mouth, stomach and breathing The Immune Response