英语词汇“Excretory system”是什么意思，翻译、用法及简单造句-英汉双解词典-英汉网

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单词	Excretory system
释义	Excretory system 英语例句库 Describe the excretory system of the genus Nereis briefly. 简述沙蚕属的排泄系统。英语百科 Excretory system The excretory system is a passive biological system that removes excess, unnecessary materials from the body fluids of an organism, so as to help maintain internal chemical homeostasis and prevent damage to the body. The dual function of excretory systems is the elimination of the waste products of metabolism and to drain the body of used up and broken down components in a liquid and gaseous state. In humans and other amniotes (mammals, birds and reptiles) most of these substances leave the body as urine and to some degree exhalation, mammals also expel them through sweating.
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