parathyroid

例句：

1. 1. The parathyroid gland is responsible for regulating calcium levels in the body.
   甲状旁腺负责调节体内钙的水平。
2. 2. During pregnancy, the parathyroid glands produce more hormones to support fetal growth.
   怀孕期间，甲状旁腺产生更多的激素来支持胎儿生长。
3. 3. A thyroidectomy is a surgical procedure that removes a portion of the thyroid gland.
   甲状腺切除术是一种外科手术，用于切除部分甲状腺。