江豚甲状腺和肾上腺的超微结构

应用组织学、组织化学和电了显微镜技术观察了江豚甲状腺和肾上腺的显微及超微结构。结果表明：江豚甲状腺的结构与其他陆生哺乳类动物的基本相似，但滤泡旁细胞的数量较多，有些滤泡的大部分由滤泡旁细胞组成。在电镜下，可观察到四种类型的甲状腺滤泡上皮细胞，这些不同类型的细胞可能是滤泡上皮细胞不同生理状态的表现形式。滤泡细胞的顶端和基部没有微绒毛，肾上腺的结构也与其它陆生哺乳运动的基本相同，由皮质和髓质构成，皮质

The ultrastructure of the thyroid gland and the adrenal gland of finless black porpoises(Neophocaena phocaenoides)from Yangtze River

Using light and electron microscopy the fine structure of the thyroid gland and the adrenal gland of finless porpoises from Yangtze River were observed.The results show that the structure of the thyroid gland is similar to that of any other mammals.But the number of the parafollicular cells is large and these cells constitute a large part of some follicles.With respect of the ultra\|stucture of the thyroid gland,four types of follicular cells are observed.It is thought that those different types of cells may be the expression of the follicular cells under physiologically different states.In addition,microvillus or fold on the apical and the basal surface of the follicular cells are not seen.The structure of the adrenal gland is also rather similar to that of any other mammals and is usually composed of cortex and medulla.The adrenal cortex contains zona glomerulosa,zona fasciculate and zona reticularis.But the zona glomerulosa is sometimes absent.Two types of adrenal cortical cells are observed by electron microscopy.In one type of cells,a large number of the rough endoplasmic reticula are present,while in another type of cells,the smooth endoplasmic reticula and mitochondria are very abundant.