2. flatworms
3. bilateral symmetry (2)
4. gastrovascular cavity (2)
5. roundworms
6. complete digestive tract
7. planarian
8. jellyfish
9. amebocytes
10. osculum
11. all are sessile
12. hydra
13. tapeworm
14. anus
15. cnidocytes
16. tentacles
17. trichinella
18. fluke
19. filter feeders
20. many are parasitic (2)
A. Porifera
B. Cnidaria
C. Platyhelminthes
D. Nematoda
