Immune System Accessory Cells provides a comprehensive survey of all types of antigen-presenting and accessory cells. Macrophages are emphasized through descriptions of different types of endocytosis, other major properties, and all basic and new information concerning macrophages as antigen-presenting cells. Other topics covered include the impact of the immunodeficient state on accessory functions, the evolutionary emergence of accessory functions, and the role of various cell types in defense reactions in major assemblages of Metazoa. The book also presents a chapter describing the phylogenetic aspects of accessory functions, which traces the first accessory cells during the evolution of living matter. Immune System Accessory Cells is an excellent reference for immunologists, cell biologists, and others interested in developing an understanding of the roles of accessory cells in all facets of immune reactions.