在人体的胸骨后面.有一对颜色灰红、质地柔软的校形器官.这对还不到一两重的“小家伙”,到底于人体有何作用,多少年来医学家们百思不得其解.直到六十年代末,随着免疫学研究的发展,胸腺的功能才逐渐被揭开.原来,在人体防御“外敌”入侵和平定“内奸”的战斗中,;它立下了汗马功劳,被医学家冠以“免疫中枢”之美称.很多人都知道,人体内有一种淋巴细胞,是保护人体健康的主力军.当它们发现有病原微生物侵入人体时,便会立即同入侵者展开死搏斗,直至把入侵者消灭为止.但说来使人感到惊奇的是,当这些淋巴细胞从骨髓里制造出来的时候,却是完全没有战斗力的.新生的淋巴细胞必须进入胸腺这所“军事学校”,接受严格的训练后,才学会识别敌我友的本领. Behind the sternum of the human body, there is a pair of school-shaped organs that are grayish in color and soft in texture. This is less than a pair of “little guys.” In the end, what role does the human body play? For many years, medical scientists have been puzzled. Until the end of the 1960s, with the development of immunological research, the function of the thymus was gradually uncovered. It turned out that in the battle against the invasion of the human defense “outside enemy” and peaceful “domesticism”, it made a lot of contributions and was Medical scientists are known as the “immune center.” Many people know that there is a kind of lymphocyte in the human body and it is the main force to protect human health. When they discover that pathogenic microorganisms invade the human body, they will immediately fight with the invaders. Until the intruder was destroyed, but what surprised people was that when these lymphocytes were manufactured from the bone marrow, they were completely incapable of fighting. Newborn lymphocytes must enter the “military school” of the thymus. After receiving rigorous training, they learned to identify the enemy and my friends.