红细胞和白细胞均来源于造血干细胞。以往认为,它们虽来源相同,但功能各异,前者主要是运送呼吸性气体,后者则参与免疫和防御机制。近年来随着对免疫学研究的逐步深入,已认识到红细胞不仅具有呼吸功能,而且象白细胞一样具有免疫功能。为此,Siegl等提出了“红细胞免疫系统” Both red blood cells and white blood cells are derived from hematopoietic stem cells. In the past, although they all came from the same source but with different functions, the former mainly deliver respiratory gases and the latter are involved in the immune and defense mechanisms. In recent years, with the gradual deepening of the study of immunology, has been recognized that not only has the respiratory function of red blood cells, but also has the same immune function as white blood cells. To this end, Siegl and other proposed “red blood cell immune system”