Recognition and mediation system Effecto cell tupe Macrophages(MOs) nd h 3.Netural Killer cells (NK) Conserved recognitio Provoking factor TNE-ST factor） Complement Receptors Nine different receptors recognize complement and six of these receptors recognize product of C3. 1.Macrophages CR1 Rca7, K L es CSR Example CR3 receptor C3b Provoking agent Macrophage Effector cell