title: The echinoid immune system revisited.
authors.forename: R D
authors.initials: RD
authors.lastname: Karp
mesh_terms: D000818:Animals; D003058:Cockroaches / Q000276:immunology; D004447:Echinodermata / Q000276:immunology*; D006434:Hemocytes / Q000637:transplantation; D008954:Models, Biological; D012617:Sea Urchins / Q000276:immunology; D013045:Species Specificity; D014184:Transplantation, Homologous / Q000276:immunology