The accumulation organ is the accumulation site of poisons in the body. The concentration of poisons in the accumulation organ is higher than that in other organs, but it does not necessarily show toxic effect on the accumulation organ. This toxic effect can also be expressed by another organ through some pathophysiological mechanism, which is called effector organ.
Radionuclides deposited in the reticuloendothelial system cause serious damage to the liver and spleen, resulting in toxic hepatitis, so the reticuloendothelial system is a accumulation organ is a correct judgment according to the above definition.