Immunity, Drawing

An Organism's Defense Mechanisms. An Organism's Defense Mechanisms. Illustration Of A Body's Immune Responses To Invasions By Antigens, Viruses Or Bacteria. On The Left, Fragments Of Antigens Are Presented By The Dendritic Cells To The T Cd4 Lymphocytes Which Trigger An Immune Response Which Incites "Killer" T Cd8 Lymphocytes To Destroy The Infected Cells And "Memory" T Cd8 Lymphocytes To Be Stored In Case Of A New Attack. On The Right, The Antigens Are Presented To The B Lymphocytes Which Recognize Them, Triggering An Immune Response Producing Antibodies Capable Of Destroying The Antigen And "Memory" B Lymphocytes To Be Stored In Case Of A New Attack. (Photo By BSIP/UIG Via Getty Images)