甲状腺是人体的一个器官,在脖子的前下方气管两侧,分左右两叶对称,呈蝴蝶形,大小因人而异。一般为30克左右,质地较软,正常情况下外表看不见也摸不到。甲状腺是人体最大的内分泌器官,主要作用是摄取和储存碘以及合成和分泌甲状腺激素和降钙素。正常情况下,甲状腺激素的分泌量根据人体的需要可自动调节,过多或过少都将引起相应的疾病。过多就是 The thyroid gland is an organ of the human body. On both sides of the anterior trachea of ​​the neck, it is symmetrical about the left and right lobes. It is butterfly-shaped and varies in size from person to person. Generally about 30 grams, texture is soft, under normal circumstances can not see the appearance and touch. The thyroid gland is the largest endocrine organ in the human body. Its main role is to take up and store iodine and to synthesize and secrete thyroid hormones and calcitonin. Under normal circumstances, the secretion of thyroid hormone can be automatically adjusted according to the needs of the body, too much or too little will cause the corresponding disease. Too much is