答:淋巴是指细胞间隙里的组织液透过毛细淋巴管而形成的液体成分。它是人体细胞赖以生活的体内环境——内环境成分之一。淋巴可通过淋巴循环进入左右锁骨下静脉而进入血液循环。淋巴细胞属于白细胞,在机体的特异性免疫中起重要作用。按其发生和免疫机能的差异主要分为两类:B A: Lymphoid refers to the liquid component formed by the interstitial fluid in the intercellular space through the lymphatic capillaries. It is one of the internal environmental components of the in vivo environment in which human cells live. Lymph can enter the blood circulation through the lymphatic circulation into the left and right subclavian veins. Lymphocytes belong to white blood cells and play an important role in the body’s specific immunity. According to their occurrence and immune function differences are divided into two categories: B