免疫器官分为中枢和周围免疫器官。这两类器官关系非常密切(图1)。前者发生较早,是T和B细胞发育的场所,并向后者输送T和B细胞。后者发育较迟,是执行免疫功能起免疫反应的重要场所。但两者的差别也较明显(表1)。 Immune organs are divided into central and peripheral immune organs. The two types of organs are very close (Figure 1). The former occurs earlier, is the place for T and B cell development, and transports T and B cells to the latter. The latter development is delayed, the implementation of immune function is an important place for immune response. However, the difference between the two is also obvious (Table 1).