WebFlatworms synonyms, Flatworms pronunciation, Flatworms translation, English dictionary definition of Flatworms. n. Any of various parasitic and nonparasitic worms of the … Webflatworm, also called platyhelminth, any of the phylum Platyhelminthes, a group of soft-bodied, usually much flattened invertebrates. A number of flatworm species are free-living, but about 80 percent of all flatworms are parasitic—i.e., living on or in another organism … Flatworms lack a body cavity, are unsegmented, and the bulk of the body …

Flatworm Reproduction, Examples, & Characteristics

WebPlatyhelminthes flatworms. Platyhelminthes. flatworms. Flatworms are unsegmented, bilaterally symmetrical worms that lack a coelom (acoelomate) but that do have three germ layers. Some forms are free living but many are parasitic. Flatworms have a cephalized nervous system that consists of head ganglion ... WebFlatworm definition, any worm of the phylum Platyhelminthes, having bilateral symmetry and a soft, solid, usually flattened body, including the planarians, tapeworms, and … spine surgery on l 3 4 \u0026 5

A phylogenomic approach to resolving interrelationships of …

WebFlatworms, lacking a coelom, were traditionally thought to represent leftovers from the early days of animal evolution, before any animals had a coelom. The author suggests that modern flatworms descended from a coelomate ancestor, which lost its coelom (and its anus!) through the course of evolution. Flatwormon Wikipedia. WebThere are four traditional classes of flatworms, the largely free-living turbellarians, the ectoparasitic monogeneans, and the endoparasitic trematodes and cestodes. Trematodes have complex lifecycles involving a molluscan secondary host and a primary host in which sexual reproduction takes place. WebThe widespread occurrence of these terrestrial flat-worms (Fig. 2) is a testament to their remarkable success ... to our insight in the evolution of land flatworms: (1) colonization of the land ... spine surgery patient education