flatworm: see Platyhelminthes Platyhelminthes (plăt'ēhĕlmĭn`thēz)
..... Click the link for more information. ; worm worm, common name for various unrelated invertebrate animals with soft, often long and slender bodies. Members of the phylum Platyhelminthes , or the flatworms, are the most primitive; they are generally small and flat-bodied and include the free-living planarians
..... Click the link for more information. .

flatworm

or platyhelminth

Any of a phylum (Platyhelminthes) of soft-bodied, usually much-flattened worms, including both free-living and parasitic species. Flatworms live in a variety of marine, freshwater, and terrestrial habitats worldwide. They range in length from much less than an inch (a fraction of a millimeter) to 50 ft (15 m) and are of three main types: turbellarians (including the planarian), trematodes (see fluke), and cestodes (see tapeworm). Flatworms are bilaterally symmetrical and lack respiratory, skeletal, and circulatory systems and a body cavity. Turbellarians are mostly free-swimming, but trematodes and cestodes are parasites.

flatworm (redirected from phylum Platyhelminthes)

flatworm

flatworm
(redirected from phylum Platyhelminthes)