defense system that has evolved to protect animals from invading pathogenic microorganisms and ancer. It is able to generate an enormous variety of cells and molecules capable of specifically recognizing and eliminat ing an apparently limitless variety of foreign invaders. These cells and molecules act together in a dynamic network whose omplexity rivals that of the nervous system. Functionally, an immune response can be divided into two related activities--recognition and response. Immune
PART I AN INTRODUCTION TO IMMUNOBIOLOGY AND INNATE IMMUNITY PART II I THE RECOGNITION OF ANTIGEN PART Ill I THE DEVELOPMENT OF M ATURE LYMPHOCYTE RECEPTOR PART IV I THE ADAPTIVE IMMUNE RESPONSE PART V I THE IMMUNE SYSTEM IN HEALTH AND DISEASE PART II THE RECOGNITION PART IV THE ADAPTIVE IMMUNE PARTV THE IMMUNE SYSTEM IN