File:Regenwurm1.jpg · Wikimedia Commons · See Wikimedia Commons
A worm is a long, soft-bodied animal without bones or legs that lives in soil, water, or as a parasite in other organisms. Worms matter because they play important roles in ecosystems—for example, earthworms help break down soil and improve its quality for plants—and some types are studied by scientists to better understand biology and disease.
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- Paragordius tricuspidatus.jpeg
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- Worms (animals)
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- Vermes
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Article · 中文
蠕虫是一类长条状,软体无脊椎动物。蠕虫并不是严格的生物学,其中的一些彼此属于完全不同的物种,包括一些昆虫的幼虫、蜈蚣、蚯蚓等。全球现有超过一百万种的虫,它们存在于自然界的各个角落。 巨型蠕虫藉由身体的肌肉收缩而作运动,故通称为蠕虫。在动物分类学史上,蠕虫曾被认为是独立的,具有特殊类动物。但在分类学研究不断发展之后,人们发现蠕虫,包括扁形动物门(Phylum Platyhelminthes)、线形动物门(Phylum Nemathelminthes)和棘头动物门(Phylum Acanthocephala)所属的各种动物,具有重要意义的蠕虫种类几乎全部属于前两门。因此在分类学上,蠕虫这个名称已无意义;但习惯上仍沿用此词。由蠕虫引起的疾病称为蠕虫病,包括囊虫病、棘球蚴病、蟠尾絲蟲症、血吸虫病、鞭虫病、麦地那龙线虫病。
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