Adaptive Immunity

• • Specific
  • Second line of defense
• Humoral Immunity: B cells + Antibodies

  Cell mediated immunity: T cells + Macrophage + Cytokines
• Humoral immunity (B cells + antibodies):

  • Mediated by circulated specific antibodies
  • Defends against extracellular infections (bacteria, virus)
• Cell mediated immunity (T cells + macrophage + cytokines):

  • Mainly mediated by specifically sensitized lymphocytes + activated macrophages
  • Direct contact with T cells & Macrophage
  • Defends against intracellular infections, cancer, foreign tissues