![]() ![]() It causes a disease known as liver rot (fascioliasis). The fluke is hermaphrodite but there is cross fertilization. The secondary or intermediate host is a pond snail (a mollusc) of genus Limnaea and genus Planorbis. The disease can be prevented by not taking contaminated water.Īdult Fasciola hepatica is found in the liver and bile duct of sheep, goat which are its primary hosts. The symptoms of the disease are diarrhoea, anaemia, enlargement of liver and spleen, pain and fever. Schistosoma shows well marked sexual dimorphism.Īfter fertilization the female leaves the male and lays eggs in the smaller blood Yessels. The male carries the female permanently in the gynaecophoric canal. It is commonly called the “blood fluke” as it lives in the hepatic portal system and mesenteric blood vessels of human beings. The heads bear two lateral lobes, the auricular processes, and a pair of eyes. It is found in slow moving streams or fresh water ponds. The body is generally divided into a few to many proglottides (not true segments). These worms are endoparasites of vertebrates. Fasciola, Schistostoma, Polystomum (endoparasite of the urinary bladder of frog and turtles).Ĭlass 3. These are ecto or endoparasitic worms (flukes) Examples. ![]() These are mostly free-living flatworms Examples. ![]() Classification of Phylum Platyhelminthes:Ĭhiefly on the basis of mode of life, phylum platyhelminthes is divided into three classes.Ĭlass 1. ![]()
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