1. Invertebrates Animals Without a backbone

3. Animals Heterotroph Have symmetry Reproduce either sexually or asexually Move Multicelluar Eukaryotic

4. Invertebrates Animals without a backbone or internal skeleton.

6. Vertebrate vs Invertebrate Vertebrate- with an internal skeleton and backbone. Invertebrate- have an exoskeleton and no backbone.

8. Invertebrate Phyla Porifera – sponges Cnideria – jellyfish, sea anemones, hydra and man-o-war Platyhelminthes – flatworms Nematoda – round worms Annelida = segmented worms Mollusks – snails, slugs, clams, squids and octopus Arthropoda – millipedes, centipedes, insects, crustaceans and spiders Echinodermata – urchins and starfish

9. Porifera Sponges Mostly marine; a few freshwater 800 different species Filter feeders Hermaphrodites Hollow bodies Wandering cells Spicules Collar cells Asymmetrical Sessile

11. Cnideria Sea anemones, hydra. Coral, jellyfish, Portuguese man-o-war Radial symmetry body plans; medusa and polyp Two layers of cells Tend to float or be sessile Have tentacles with nematocysts Have gastrovascular cavity All but hydra are marine

15. Cnideria Medusa form of a jellyfish. Tentacles have stinging cells called nematocysts. Two way digestion. (In mouth out mouth.)

16. Cnideria Cnideria can have the poly form. These are vase- shaped. They are sessile.

17. Platyhelminthes (flatworms) Bilateral symmetry Mouth and anus. Free-living (planeria) or parasites (flukes and tapeworms). Nerve net for nervous system. Hermaphrodites- producing both sperm and eggs. They reproduce sexually by exchanging sex cells.

18. Planeria This is a free-living flatworm. Planarians can regenerate missing body parts.

19. Nematoda Round worms are cylindrical in shape, tapered on both ends and vary in length from microscopic to 20 inches long.

20. Nematoda (roundworms) Roundworms have a complete gut. They have one-way digestion. Mouth to anus. So they can digest food. They have no blood or heart. Most are parasites. Separate sexes. Trichinella causes trichinosis. People get this by eating undercooked pork. This affects the heart.

21. Nematoda Ascaris are parasites of the lungs. Filaria attack the lymphatic system

22. Mollusca Snails, slugs, bivalves, octopus, squid and nautilus. Many have shells. All have soft bodies. All have a mantle. All have a “foot”. Found in all habitats.

23. Mollusca Bilateral symmetry. Breath through gills or lungs. Three chambered heart. Sexual reproduction even though some are hermaphroditic. All have open circulatory system except squids and octopuses.

24. Mollusca-Gastropods Snails and slugs. “Stomach foot” for gliding. Most are marine but a few are terrestrial. Largest snail is 15 lbs.

25. Mollusca-Bivalves Two shells Digging foot Filter feeders. Open circulatory system. Gills

26. Mollusca-Cephalopods Squids and Octopus and Nautilus. Have a beak. Have no shell Foot is tentacles Most intelligent invertebrate. Giant squid is largest cephalopod-60 m.

27. Edible Mollusks

28. Annelida Segmented worms Live in all habitats. Segmentation give these worms flexibility in movement. Have a tube with-in a tube body plan. This is called a Coelom: a fully lined gut that contains the body organs.

29. Annelida Bilateral symmetry. One-way digestion Well-developed brain. Hermaphrodites with sexual reproduction. Each segment have setae (bristles) for movement. Have a central nervous system. Have a simple excretory system. Intestines and nephridia. Respire through moist skin. Closed circulatory system.

30. Annelida Free-living – earthworms and ploychaetes from the sea. Parasitic – leeches.

31. Arthropods Segmented bodies Exoskeleton – go thru molting to shed and grow. Jointed appendages Specialized body segments. Open circulatory system.

32. Arthropods Centipedes One pair of jointed Appendages Per segment. Poisoness.

33. Arthropods-Millipedes Two pairs of legs per segment. Herbivore or scavengers.

34. Arthropods - Crustaceans Crabs, shrimps, lobster, crayfish and barnacles, pillbugs and sowbugs Have cephalothoraxes- fused head and chest. Molt to grow. Claws. Mandibles and maxillas for mouth parts. Breathe with gills.

35. Arthropods - Insecta Three body segments- head, thorax and abdomen. 3 pairs of segmented legs on thorax. Fly. Metamorphosis (either complete or incomplete) Breathe with spiracles. Simple and compound eyes.

36. Arthropods - Arachnids Two body segments- head and abdomen 4 pairs of legs on abdomen Simple eyes Poison prey and spin a web.

37. Echinodermata (spiny skin) Starfish, sea urchins, sea cucumbers and sand dollars. Tube feet with a water vascular system. Radial symmetry.

38. Echinoderms