Trematode (吸虫)
Trematode （吸虫）
Introduction ■ I axonomic position a Phylum platyhelminthes 口 Class Trematoda 口 Order Digenea
Introduction ◼ Taxonomic position Phylum platyhelminthes Class Trematoda Order Digenea
Trematodes that have medical importance Species Reside in Clonorchis sinensis hepatic bile duct Fasciolopsis buski Small intestine Paragonimus westermani Lung subcutaneous, etc Schistosoma japonicum portal system S. mansoni etc
Species Reside in Clonorchis sinensis hepatic bile duct Fasciolopsis buski Small intestine Paragonimus westermani Lung, subcutaneous, etc. Schistosoma japonicum S.mansoni, etc portal system Trematodes that have medical importance
General features eaf-like flattened bodies with no body cavity; with oral and ventral suckers to aid attachment to their hosts
General features Leaf-like flattened bodies with no body cavity; with oral and ventral suckers to aid attachment to their hosts
General features The tegument is a syncytial layer equipped with spines and muscles a Digestive system degenerated with a mouth, enclosed by the oral sucker but no anus mouth→ pharynx→ esophagus→ two digestive tracts u Hermaphrodite or monoecious except blood flukes (dimorphism), possessing both male and female reproductive organs, the appearance and position of which are very important taxonomically
◼ The tegument is a syncytial layer equipped with spines and muscles ◼ Digestive system degenerated， with a mouth, enclosed by the oral sucker but no anus. mouth→pharynx →esophagus → two digestive tracts ◼ Hermaphrodite or monoecious except blood flukes (dimorphism) , possessing both male and female reproductive organs, the appearance and position of which are very important taxonomically General features