胸腺是动物体内最早形成的淋巴器官,其基质由上皮细胞组成,胸腺的上皮细胞能合成和分泌胸腺激素。胸腺及其分泌的激素,对T淋巴细胞的正常分化成熟、对淋巴系统功能的调节、免疫稳定性的维持及免疫监管等方面都具有重要的作用。随着年龄的增长,胸腺逐渐萎缩,胸腺激素水平亦逐渐降低,免疫功能随之下降。本实验对不同日龄小鼠胸腺重量作了一些观察和比较。材料和方法 1.小鼠来源:从成都生物制品所购回昆明种小鼠。在本院动物房饲养、繁殖。 2.胸腺组织标本的选取:各窝雌雄小鼠,记录出生日期。分别在10、20、30、37、44、51、58以及300天,随机分出部份小鼠,称重后,断头、立即解剖,取出胸腺,用泸纸吸去胸腺上的液体。在组织天平上称取胸腺的重量,换算成每100克小鼠体重之胸腺毫 Thymus is the first animal body formed lymphoid organs, the matrix composed of epithelial cells, thymic epithelial cells can synthesize and secretion of thymus hormone. Thymus and its secretion of hormones on the normal differentiation and maturation of T lymphocytes, regulating the function of the lymphatic system, the maintenance of immune stability and immune regulation plays an important role. With age, thymus gradually shrinking, thymus hormone levels also gradually decreased, the immune function decreased. In this experiment, the thymus weight of mice of different ages were observed and compared. Materials and Methods 1. Mouse Origin: Kunming mice purchased from Chengdu Biological Products. In our hospital animal room breeding, breeding. 2. thymus tissue samples: male and female mice in each litter, record the date of birth. At 10, 20, 30, 37, 44, 51, 58 and 300 days respectively, some mice were randomly divided into two groups. After weighed, the mice were decapitated and immediately dissected. The thymus was removed and the thymus was aspirated with lumber. The weighed thymus in the balance of the weight of the organization, converted into per 100 grams of mouse thymus g body weight