After reading this chapter and analyzing the content, it is assumed that you can:

1. Explain why bilateral symmetry has selective value for motile organisms.
   
   
2. Define endoparasitic, free living, commensal and ectoparasitic.
   
   
3. Describe the body plan of a typical turbellarian.
   
   
4. Describe the mechanisms that flatworms use to supply yolk for their embryos.
   
   
5. Know what planarians eat and how they digest their food.
   
   
6. Describe the osmoregulatory system, the nervous system, and the sense organs of turbellarians, trematodes, and cestodes.
   
   
7. Contrast asexual reproduction in triclad turbellarians, Trematoda, and Cestoda.
   
   
8. Outline the life cycles of both the monogenean and the digenetic trematode.
   
   
9. Describe the tegument of most turbellarians and contrast with other classes of platyhelminthes.
   
   
10. Explain how humans become infected with Clonorchis and Schistosoma.
    
    
11. Explain why Taenia solium is extremely dangerous.
    
    
12. Define scolex, microtriches, proglottids, and strobila.
    
    
13. Contrast nemerteans with platyhelminthes.
    
    
14. Explain how members of Acoelomorpha differ from typical protostomes.
    
    
15. Describe the body cavity formed by schizocoely in nemerteans.
    
    
16. Describe how mesozoans differ morphologically from the acoelomorphans.