The parathyroid gland was embeded in thymus of immature (50g) and mature (500g) Trionyx sinensis, and the gland was mainly composed of chief cells.

• 在50g左右的幼鳖和500g成年鳖胸腺内尚观察到甲状旁腺组织，腺细胞主要由主细胞构成。