绪言一般认为,人胚胎时期的甲状腺,在滤泡形成及胶体产生以后,紧接着即有功能活动。实验证明,在胶体开始产生时,如给予母体服用放射性碘,即可见其胚胎的甲状腺开始有碘的积聚。因此,研究滤泡及胶 Introduction Generally believed that the human embryonic thyroid, follicular formation and colloid production, followed by that there is a functional activity. Experiments show that when the colloid began to produce, such as giving the mother to take radioactive iodine, you can see the embryo’s thyroid began iodine accumulation. Therefore, research follicular and plastic