华鲮泌尿系统组织学的初步观察

2004年3月至9月采用常规组织学方法对华鲮泌尿系统作了研究，结果表明：华鲮泌尿系统包括中肾、输尿管、膀胱。中肾由肾小体和肾小管组成，无皮质、髓质之分，有肾小体聚集现象；肾小管可分为颈段、第一近曲小管、第二近曲小管、远曲小管、集合管。肾中散布有大量淋巴髓样组织，还有甲状腺滤泡和斯坦尼氏小体，显然华鲮的肾脏是一个具有多种生理功能的复合器官。输尿管位于两肾叶腹侧，其上皮为似复层，缺黏膜下层，无纵肌，外膜甚薄。左右输尿管在后端合并，稍微扩大，形成膀胱，膀胱内壁具有发达的绒毛，绒毛表面为变移上皮。

Histological Observations on Urinary System of Sinilabeo rendahli Kimurai

The urinary system of Sinilabeo rendahi Kimurai is composed of mesonephros, ureter and bladder. The mesonephros includied renal corpuscle and renal tubules, and appeared at a low level for it had no zones of cortex and medulla but aggregation of renal corpuscles was observed in the edge of the kidney. The renal tubules were composed of the neck segment, first and second proximal segment, distal segment and the collecting duct. Eosinophil cells were found in the epithelium of the first proximal segment. Lymphoid tissue and thyroid gland interspersed in the kidney, indicating that it was a multifunetion organ. The two ureters were located at the ventral position of the kidney. The musoca was sin gle column or pseudo-stratified column epithelium without the submucosa. No longitudinal musules were present and the sercsa, if any, was wery thin. The two ureters fused at the end and ran a course into the bladder, which had villi epithelium. The surface of the villi was a transitional epithelium.