| 释义 |
contractile vacuolen.（名词）- A membrane-bound organelle found in certain protists that pumps fluid in a cyclical manner from within the cell to the outside by alternately filling and then contracting to release its contents at various points on the surface of the cell. It functions in maintaining osmotic equilibrium.收缩泡，伸缩泡：一种见于某些原生生物体内且裹有细胞膜的细胞器，通过其细胞表面各点胀满然后收缩并释放内含物的交替行为，而将流质从体内循环往复地抽运到体外。起到维持渗透平衡浓度的作用
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