The Immune System Innate ·Acquired(Adaptive) ·Antimicrobial -B Lymphocytes Peptides Antibody ·Phagocytes (Macrophages,PMNs, -T Lymphocytes Monocytes,DCs) Cytotoxicity Help”Antibody 。Alternative Cytokine Secretion Complement System BDC The Immune System • Innate • Antimicrobial Peptides • Phagocytes (Macrophages, PMNs, Monocytes, DCs) • Alternative Complement System • Acquired (Adaptive) -B Lymphocytes Antibody -T Lymphocytes Cytotoxicity “Help” Antibody Cytokine Secretion BDC