1. Review of Animal Phylogeny

2. Sponges

3. Anatomy of a Sponge

4. Polyp and Medusa Forms of Cnidarians

5. Jelly Medusa

6. A Cnidocyte of a Hydra

8. Cnidarians: Hydrozoans (top left), jelly (top right), sea anemone (bottom left), coral polyps (bottom right)

9. Purple striped jelly, Pelagia panopyra

10. Coral Polyps

11. The Life Cycle of the Hydrozoan Obelia

15. Ctenophore

16. Classes of Phylum Platyhelminthes

17. A Flatworm

18. Anatomy of a Planarian

19. The Life History of a Blood Fluke, Schistosoma mansoni

20. Anatomy of a Tapeworm

21. Basic Body Plan of Mollusks

22. Major Classes of Phylum Mollusca

23. Chiton

24. The Results of Torsion in a Gastropod

25. Garden Snail

26. Gastropods: Nudibranchs (top left and top right), terrestrial snail (bottom left), deer cowrie (bottom right)

27. A Bivalve: Scallop

28. Anatomy of a Clam

29. Cephalopods: Squid (top left and bottom left), nautilus (top right), octopus (bottom right)

30. Anatomy of an Earthworm

31. External Anatomy of an Earthworm Clitellum

33. Annelids, the segmented worms: Polychaete (left), feather-duster worm (middle), leech (right)

34. Christmas-Tree Worms

35. Nematode, C. elegans

36. Parasite nematode, Trichinella spiralis

37. External Anatomy of an Arthropod

39. A Trilobite Fossil

40. Horseshoe Crabs, Limulus polyphemus

41. Arachnids: Scorpion (left), honeybee air tube filled with parasitic mites (right)

42. Spider Anatomy

43. Lycosid Spider: Female With Offspring

44. Class Diplopoda (millipedes)

45. Insect flight, Dragonfly

46. Anatomy of a Grasshopper, an Insect

47. Insecta: Beetle

48. Metamorphosis of a Butterfly Larva Pupa Emerging Adult Adult

49. Crustaceans: Lobster (top left), banded coral shrimp (bottom left), barnacles

50. Ochre sea stars, Pisaster ochraceus

51. Anatomy of a Sea Star

52. Echinoderms: Sea star (top left), brittle star (top right), sea urchin (bottom left), sea lily (bottom right),

54. 1)Name the four characteristics of most mollusks. 2) Name the three classes of mollusks and a representa- tive organism in each.

55. 1)Snails and slugs need a moist skin for.. 2) How does circulation differ in the cephalopods compared to the other mollusks? 3) How can nudibranches protect themselves?

56. 1) Which of the following is least related to the others? a.limpet b. nudibranch c. abalone d. scallop 2) Other than jewelry (oysters) and food, for what purpose can mollusks be used?

57. 1)Name three characteristics of all arthropods. 2) Name two structures used for respiration.

58. What controls when an arthropod molts? In crayfish and other decapods the claws are called ________. Horseshoe crabs are not true crabs; their internal anatomy is more similar to that of..

59. The chiton moves using its ______. Name two gastropods. What are four common characteristics of most mollusks?