This comprehensive treatise on the reticuloendothelial system is a project jointly shared by individual members of the Reticuloendothelial (RE) Society and bio- medical scientists in general who are interested in the intricate system of cells and molecular moieties derived from those cells that constitute the RES. It may now be more fashionable in some quarters to consider these cells as part of what is called the mononuc1ear phagocytic system or the lymphoreticular system. Nevertheless, because of historical developments and current interest in the subject by investigators from many diverse...