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any worm of the phylum Platyhelminthes, having bilateral symmetry and a soft, solid, usually flattened body, including the planarians, tapeworms, and trematodes; platyhelminth.
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Flatworm - Wikipedia


The flatworms, flat worms, Platyhelminthes, Plathelminthes, or platyhelminths are a phylum of relatively simple bilaterian, unsegmented, soft-bodied ...

Introduction to the Platyhelminthes


Introduction to the Platyhelminthes, the flatworms: life in two dimensions. One page of text with a few photographs.

World's Weirdest: Flatworm Penis Fencing - National Geographic


For flatworms, "Who's your daddy?" is a loaded question. In a bizarre bout lasting up to an hour, the first flatworm to stab and inseminate its mate becomes the ...

flatworm | invertebrate | Britannica.com


Nov 26, 2008 ... Flatworm, also called platyhelminth, any of the phylum Platyhelminthes, a group of soft-bodied, usually much flattened invertebrates. A number ...

Flatworms - Facts, Diet & Habitat Information - Animal Corner


Flat Worms (Phylum Platyhelminthes). Flatworms are the simplest of the worm groups. There are about 20,000 species in this group. Flatworms are found many  ...



Flatworms are the simplest of the worm groups. There are about 20,000 species in this group. They are found many places and can be free living or parasitic.

Flatworms: The First Hunter | the Shape of Life | The Story of the ...


Flatworms, the first animal to hunt, are found in the ocean, freshwater, on land, and even inside other animals. The ancient flatworms were the first animals to ...

Biology4Kids.com: Invertebrates: Flat Worms


Flatworms - Ummm. They're Flat. We have to run out of steam there. But that's the one obvious connection between all of the worms in this group. Sure we can ...