摘要
光镜观察发现,翘嘴鲌(Culter alburnus)肝脏浆膜较薄,边缘肝细胞排列紧密,肝小叶不明显,肝血窦相互交织成网络状,可见枯否氏细胞,偶见双核肝细胞.肝实质中有极少量胰腺组织分布.肝内血管系统由小叶间静脉、小叶间动脉、肝血窦、中央静脉、支静脉和肝叶中央静脉组成,肝叶中央静脉特别发达,贯穿整条肝叶,管壁较薄,由内皮和结缔组织组成.胆管系统由胆小管、小叶内胆管、小叶间胆管、支胆管和肝叶中央胆管组成,其中支胆管和肝叶中央胆管特别发达,肝叶中央胆管与肝叶中央静脉伴行,管壁较厚,分为3层,内层由单层高柱状上皮和固有膜组成,中层由环形平滑肌组成,外层由结缔组织组成.电镜观察发现,翘嘴鲌肝细胞无明显的双态现象,常染色质充满整个细胞核,核仁大而明显.胞质中分布有丰富的核糖体和发达的内质网,线粒体特别丰富,内嵴发达,可见次级溶酶体和髓样小体,髓样小体周围有较多线粒体环绕,糖原颗粒丰富,但脂滴较少.肝细胞近狄氏间隙面和近胆小管面突起形成较多微绒毛,高尔基复合体靠近胆小管区域分布,说明肝细胞具有旺盛的吸收、合成和分泌能力.
Under light microscope,the chorion of the liver of Culter alburnus is thin and hepatocytes near the edge are tightly arranged.The hepatic lobules are not obvious.The hepatic sinusoids form networks and the Kupffer,s cells are visible.Occasionally,binuclear hepatocytes are detected.A tiny amount of pancreatic tissue extends into the liver.The vessel system within the liver consists of interlobular vein,interlobular artery,hepatic sinusoid,central vein,branch vein and central vein of liver lobule.The last vessel(central vein of liver lobule),whose wall is thin and is composed of endothelium and connective tissue,goes through the liver lobule.The bile duct system consists of bile canaliculus,endolobular bile duct,interlobular bile duct,branch bile duct and central bile duct of liver lobule,and the last 2 posterior bile ducts are well developed.The central bile duct of liver lobule,whose wall is thick and is divided into 3 layers(the inner layer composed of simple highly columnar epithelium and lamina propria,the midst layer of circular smooth muscle and the outer layer of connective tissue),is accompanied with the central vein of liver lobule.Under electron microscope,the hepatocytes of C.alburnus show no distinct dimorphism.The euchromatin is abundant in the nucleus and the nucleolus is rather big.The cytoplasm contains abundant ribosomes and well developed endoplasmic reticulum,and the mitochondria,whose cristae are well developed,are abundant,and secondary lysosomes and myelin figures surrounded by many mitochondria are seen.Many glycogen granules and few lipid droplets are present in the cytoplasm.Lots of finger microvilli from hepatocytes are formed in the Disse,s space and the bile canaliculus,and the Golgi complex is near the bile canaliculus,suggesting that the hepatocytes are active in absorbing,synthesizing and excreting.
出处
《西南大学学报(自然科学版)》
CAS
CSCD
北大核心
2011年第2期50-56,共7页
Journal of Southwest University(Natural Science Edition)
基金
重庆市科委攻关资助项目(CSTC,2007AC1043)
关键词
翘嘴鲌
肝脏
结构
肝内血管系统
胆管系统
Culter alburnus
liver
structure
vessel system within the liver
bile duct system