尾蚴
吸虫纲有些动物的末期幼虫，由第二代包蚴产生或由雷蚴直接产生.身体由长圆形的躯干和细长的尾部组成.有口吸盘及腹吸盘，肠道分两支.还有若干焰细胞和一对排泄管，在躯干后端会合为排泄囊，向尾内延伸为一细长的排泄管至尾部末端开孔.体内的生殖细胞将来发展为成虫的生殖系统.尾蚴钻出中间寄主后，在水中直接钻入终末寄主或第二中间寄主.有些种类的尾蚴附于水草等作物，脱去尾部分泌包囊，被终末寄主食入而进到体内.GOOGLE英文翻译:The end of Trematoda larvae of some animals from the second-generation packet-Lei larva larva produced or by directly elected. The body by a long round torso and slender tail. There are oral sucker and ventral sucker, intestinal sub-2. Huan A number of flame cells and a pair of excretory duct, in the trunk back to join the excretory bladder, to be extended as a slender tail of the excretory duct to the tail end of the hole. the body's reproductive cells for the future development of adult reproductive system. cercaria drill out the intermediate host, the host in the water directly to penetrate into the terminal or the second intermediate host. Some types of cercariae attached to aquatic plants and other crops, off the tail secretion cysts, was the staple food on entry into the terminal send into the body.
