title: Complement and cellular triggering reactions. Introductory remarks.
mesh_terms: D000818:Animals; D003176:Complement C3 / Q000502:physiology; D003165:Complement System Proteins / Q000502:physiology*; D006801:Humans; D007111:Immunity, Cellular; D011951:Receptors, Complement / Q000502:physiology; D017463:Receptors, Complement 3b
chemical_list: D003176:Complement C3; D011951:Receptors, Complement; D017463:Receptors, Complement 3b; D003165:Complement System Proteins