焰细胞(flame cell)：位子排泄管分枝的末端，是二个中空的细胞，内有一束纤毛。 排泄孔(excretory pore)：位于体背侧，排泄管向外的开口。
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N an organ of excretion in flatworms: a hollow cup-shaped cell containing a bunch of cilia, whose movement draws in waste products and wafts them to the outside through a connecting tubule 焰细胞
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