Chan A S
Acta Anat (Basel). 1977;97(2):205-12. doi: 10.1159/000144735.
The ultrastructure of the parathyroid glands in 4-week-old white leghorn chicks has been examined. The gland consists of chief cells arranged in diffuse cords or solid masses. The chief cells vary in electron density. The rough-surfaced endoplasmic reticulum is invariably moderately to well developed and consists of cisternae arranged in well-ordered patterns or distributed randomly. The Golgi complex consists of cisternae arranged in concentric layers, smooth-surfaced and coated vesicles. Cisternae of the Golgi complex arranged in circular and tortuous profiles are also observed. The chief cells contain occasional membrane-limited secretory granules 150-350 nm in diameter and with contents which vary in electron density. Secretory granules are distributed randomly in the cytoplasm and along with the plasma membrane, Images of fusion of coated vesicles with the plasma membrane are sometimes observed. The cytoplasm also contains round- to rod-shaped mitochondria, lysosome-like structures and occasional lipid bodies. Dark cells with electron-dense cytoplasm and containing organelles in close proximity are also observed. Morphological evidence of synthetic and secretory activities in the chief cells suggests active parathyroid function in the rapidly growing chicks.
对4周龄白来航雏鸡的甲状旁腺超微结构进行了检查。甲状旁腺由排列成弥散索状或实体团块的主细胞组成。主细胞的电子密度各不相同。糙面内质网总是中度到高度发达，由排列有序或随机分布的扁平囊组成。高尔基体由同心层排列的扁平囊、光滑表面的囊泡和有被小泡组成。还观察到呈圆形和曲折形态的高尔基体扁平囊。主细胞偶尔含有直径为150 - 350 nm的膜包被分泌颗粒，其内容物的电子密度各不相同。分泌颗粒随机分布在细胞质中并靠近质膜，有时可观察到有被小泡与质膜融合的图像。细胞质中还含有圆形到杆状的线粒体、溶酶体样结构和偶尔的脂滴。还观察到细胞质电子密度高且含有紧密相邻细胞器的暗细胞。主细胞中合成和分泌活动的形态学证据表明，快速生长的雏鸡甲状旁腺功能活跃。
