非洲雏鸵鸟泌尿系统的解剖学研究

鸵鸟的排泄行为与其它乌纲动物有明显的区别。为了探明其形态学基础，解剖观察了8羽非洲雏鸵鸟泌尿器官的形态位置及结构特征。研究结果如下：非洲雏鸵鸟的泌尿系统由肾脏、输尿管和泄殖道组成，肾脏分前、中、后三部分；泄殖道形似哺乳动物的膀胱，可存储大量尿液。结果表明非洲雏鸵鸟的泌尿系统不同于其它乌纲动物，清晰地解释了非洲鸵鸟先排尿随后排粪这一独特的生理行为，说明了结构与功能的统一。

Anatomic Study on the Urinary System of African Ostrich Chicks

The excretion behavior of African ostrich was remarkably different from that of other birds.The urinary system of eight African ostrich chicks were anatomized in order to investigate the morphological basis of the difference.Results of anatomy showed that the urinary organ of African ostrich was different from those of other birds:composed of kidney,ureter and urodeum;the kidney was divided into three parts:cranial,middle and caudal;the structure of urodeum was similar to that of urinary bladder of mammals,so being able to store a lot of urine.