Title Trematodes and Cestodes ppt PSC class.pdf ✅

1 Trematodes and Cestodes Dr. PRIYA M. N Assistant Professor Department of Veterinary Parasitology CVAS, Mannuthy
Platyhelminthes/Flatworms ⚫ Trematodes/flukes and Cestodes/Tapeworms ⚫ Dorsoventrally flattened ⚫ Acoelomate – organs embedded in parenchyma ⚫ Excretory organs- flame cells/protonephridia ⚫ Respiratory and blood vascular system-absent ⚫ Trematodes- have alimentary canal- no anus ⚫ Cestodes- no alimentary canal 2
Trematodes ⚫ Hermaphrodites except schistosomes Shapes may vary Long and narrow- Schistosomes Leaf shaped- Fasciola Thick and fleshy-Amphistomes 3
Trematodes ⚫ Suckers – organs of attachment ⚫Anterior sucker/oral sucker ⚫Ventral sucker/acetabulum ⚫Monostomes-only one sucker- Cymbiforma indica 4  Monostome - mouth, no acetabulum  Amphistome - acetabulum at end  Distome - acetabulum at center, "normal"  Echinostome - spines around mouth  Strigeoid - forebody and hindbody  Schistosome - split body