1. Chapter 37: Platyhelminthes and Nematoda

3. Phylum Platyhelminthes Class Turbellaria –3000 species, all(?) freeliving –E.g., planaria (Dugesia) Class Trematoda –All parasitic –E.g., flukes (Fasciola) Class Cestoda –All parasitic –E.g., tapeworms (Taenia)

4. Class: Turbellaria

5. Class: Trematoda (flukes)

6. Chinese Liver Fluke (Opisthorchis)

7. Schistosoma Male/female pair Schistosoma egg (highly magnified)

8. Schistosomiasis

9. An 8.8 m (28 ft) tape worm taken out of a human. They claim it was from eating sushi. Will you ever be able to eat sushi again?

10. Scolex A B

11. Mature/Gravid Proglottid A B C

12. Class: Cestoda (Tapeworms)

13. Phylum: Nematoda (roundworms) Highly numerous and diverse >1,000,000 species, many undescribed Diverse lifestyles (free living, parasitic Many are pathogenic to humans Have pseudocoelom Have complete digestive tract

14. Filarial worm

15. Elephantiasis

16. Loa loa, African Eye Worm

17. Ascaris

18. Warning!!!!!! Gross out alert! The next photo is quite graphic. View at your own risk!

21. Trichinella spiralis