淋巴细胞的分类在免疫学中已成为一个重要研究课题。各类淋巴细胞的形态学很相似,但其功能则不相似,如T、B、N、NK等亚型。 T细胞功能比较复杂有:l、迟发型超敏反应;2、扩大免疫反应; The classification of lymphocytes has become an important research topic in immunology. The morphology of various types of lymphocytes are similar, but their functions are not similar, such as T, B, N, NK and other subtypes. T-cell functions are more complex: l, delayed type hypersensitivity; 2, to expand the immune response;