扁虫动物原本是扁形动物门的同义词，此处是几个门的统称，属于两侧对称动物；扁虫称动物；
涡虫类扁虫能被切成三十二片，而每一片都会长成一只全新的动物，眼睛、嘴和内脏俱全。
The tiny flatworm Planaria can be cut into as many as 32 pieces, each of which will grow into a whole new animal complete with eyes, mouth and internal organs.
真涡虫是一种扁虫，一种可以被认为是动物的最低级生命形式。
A planarian is a flatworm, one of the lowest life-forms that can be considered an animal.
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