1. Mollusks Kingdom Animalia Phylum Mollusca Class Gastropoda Class Bivalvia Class Cephlapoda

2. Mollusks 50,000 species 10 classes Includes: Squid Octopus Clams Conches Snails Sea slugs Oysters

3. Basic Anatomical Structures: a) Mantle – muscular bag that surrounds the gills and most organs and is used to circulate water 1. some use it to circulate water or jet propulsion 2. secretes calcium carbonate shell

4. Basic Anatomical Structures: b) Foot – muscular structure used for movement 1. In snails & slugs it’s used to crawl 2. In bivalves it’s used to dig 3. In squids, it takes the form of tentacles

5. Basic Anatomical Structures: c) Radula – a tongue like structure with scraping teeth

7. Some have a shell

8. Sensitive Tentacles

10. Snails Sea SlugsWhelks Abalone

12. No head, but sensory organs on shells edge

13. Two siphons extend out of the shell

15. Clam OysterMussel Scallop

16. Clam OysterMussel Scallop

17. Pearl Making Abilities When ever sand or an irritant gets inside a shell of an oyster, it coats it in a substance called nacre, creating a pearl Pearl farmers put seeds inside oysters to create pearls

19. Ink sac

20. Chromatophores – cells that can change color

22. Beak like jaws

23. No shell

25. Ten arms, two of which are longer are called tentacles

27. Eight arms and two tentacles

28. Flattened with a fin along the sides

30. Contains several gas filled chambers that aid in buoyancy

31. Has 60-90 arms to catch prey