platyhelminth 

  1. 名詞
扁形蟲
/此名詞複數為"platyhelminths"/

    
                        
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例句

                

                    
    
                                                    
  1. 
                                Rigorous comparisons show no synapomorphies of nemertean and platyhelminth nephridia.                            
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  2. 
                                The threat of platyhelminth parasites to humans in developed countries is rising because of the popularity of raw or lightly cooked foods, and imports of food from high-risk areas.                            
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  3. 
                                Hence, the traditional platyhelminth subgroup "Turbellaria" is now regarded as paraphyletic, since it excludes the wholly parasitic groups, although these are descended from one group of "turbellarians".                            
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  4. 
                                It has been agreed since 1985 that each of the wholly parasitic platyhelminth groups (Cestoda, Monogenea and Trematoda) is monophyletic, and that together these form a larger monophyletic grouping, the Neodermata, in which the adults of all members have syncitial skins.                            
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  5. 
                                Of the three main species of the platyhelminth worm Schistosoma , the most important for Egypt are S. mansoni and S . haematobium . There is a complex life cycle alternating between two hosts, humans and the fresh water snail of the genus Bulinus . The infection is caught by humans who come into contact with the free swimming worm which the snail releases in the water.                            
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