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platyhelminthes    
扁形动物

扁形动物


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  • Flatworm - Wikipedia
    Platyhelminthes (from Ancient Greek πλατύ platy 'flat' and ἕλμινς helmins 'parasitic worm') [4] is a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates commonly called flatworms or flat worms
  • Flatworm | Reproduction, Examples, Characteristics | Britannica
    flatworm, 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 and securing nourishment from it
  • Phylum Platyhelminthes- characteristics, classification, examples
    Platyhelminthes definition Platyhelminthes characteristics and Classification Class 1- Turbellaria Class 2- Trematoda Class 3- Cestoda
  • Introduction to the Platyhelminthes
    Platyhelminths have practically no fossil record A few trace fossils have been reported that were probably made by platyhelminths (Alessandrello et al , 1988), and fossil trematode eggs have been found in Egyptian mummies and in the dried dung of Pleistocene ground sloth
  • Platyhelminthes - Examples, Characteristics, Species, Habitat
    Platyhelminthes, or flatworms, are a phylum of simple, bilaterally symmetrical invertebrates with a dorsoventrally flattened body They lack specialized respiratory and circulatory systems and include both free-living species, like planarians, and parasitic species, such as tapeworms and flukes
  • Characteristics of Platyhelminthes - BYJUS
    Phylum Platyhelminthes belongs to kingdom Animalia This phylum includes 13,000 species The organisms are also known as flatworms These are acoelomates and they include many free-living and parasitic life forms Members of this phylum range in size from a single-celled organism to around 2-3 feet long Characteristics of Platyhelminthes
  • 28. 3B: Phylum Platyhelminthes - Biology LibreTexts
    Phylum Platyhelminthes is composed of the flatworms: acoelomate organisms that include many free-living and parasitic forms Most of the flatworms are classified in the superphylum Lophotrochozoa, which also includes the mollusks and annelids
  • Platyhelminthes - GeeksforGeeks
    Phylum Platyhelminthes is a phylum of invertebrates that consists of organisms that are bilaterally symmetrical and unsegmented Usually, species in this phylum are known as flatworms or tapeworms as they have flat bodies
  • Platyhelminthes (flatworms) | INFORMATION | Animal Diversity Web
    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
  • Phylum Platyhelminthes | Biology for Majors II - Lumen Learning
    In Summary: Phylum Platyhelminthes Flatworms are acoelomate, triploblastic animals They lack circulatory and respiratory systems, and have a rudimentary excretory system This digestive system is incomplete in most species





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