尾蚴
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吸蟲(chóng)綱有些動(dòng)物的末期幼蟲(chóng)，由第二代包蚴產(chǎn)生或由雷蚴直接產(chǎn)生.身體由長(zhǎng)圓形的軀干和細(xì)長(zhǎng)的尾部組成.有口吸盤(pán)及腹吸盤(pán)，腸道分兩支.還有若干焰細(xì)胞和一對(duì)排泄管，在軀干后端會(huì)合為排泄囊，向尾內(nèi)延伸為一細(xì)長(zhǎng)的排泄管至尾部末端開(kāi)孔.體內(nèi)的生殖細(xì)胞將來(lái)發(fā)展為成蟲(chóng)的生殖系統(tǒng).尾蚴鉆出中間寄主后，在水中直接鉆入終末寄主或第二中間寄主.有些種類的尾蚴附于水草等作物，脫去尾部分泌包囊，被終末寄主食入而進(jìn)到體內(nèi).GOOGLE英文翻譯: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.
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