The gonads open near the base of the abdomen and the excretory organs are usually Malpighian tubules.
生殖腺开口于近腹部基部，排泄器官通常为马氏管。
Adult worm excretory and secretory antigen, AESA
成虫代谢分泌抗原
The excretory opening of the digestive tract in animals such as birds, reptiles, amphibians, and fish.
肛门鸟, 爬行动物, 两栖动物以及鱼等动物的消化道的排泄口
Surgical construction of an artificial excretory opening from the colon.
结肠造口术在结肠上造出一个人工排泄口的外科手术。
It possesses excretory, protective, and barrier functions.
其具有排泄、保护和屏障功能。
Describe the excretory system of the genus Nereis briefly.
请简述沙蚕属的排泄系统。
The cystgland of muskrat fragrant is composed of gland cell, supporting cell and excretory duct.
麝鼠香囊腺由腺细胞、支持细胞和排香管组成。
an excretory organ of certain invertebrates.
某些无脊椎动物的排泄器官
An excretory organ of certain invertebrates.
肾某些无脊椎动物的排泄器官
The middle zone of the mesoderm of a chordate vertebrate embryo, from which excretory tissue develops.
中胚叶节脊索类脊椎动物胚胎的中胚层的中间部分，
Exercise stimulates the digestive and excretory systems.
锻炼能促进消化和排泄系统的活动。
excretory ductules of lacrimal gland.
泪腺排出小管
In the earthworm and many other invertebrates, these excretory structures are called nephridia.
在蚯蚓和许多其它无脊椎动物中，这些排泄结构称为肾管。
The excretory organ of a vertebrate embryo from which the kidney develops.
原肾脊椎动物胚胎的排泄器官, 肾由此发展而来
Germans worry about their excretory abilities.
德国人担心他们的排泄功能。
Lacking normal voluntary control of excretory functions.
大小便失禁缺乏排泻功能的正常自动控制的
Some species of water bears actually have rudimentary excretory organs.
实际上，水熊的某些种类在未发育完成时已经有排泄器官了。
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