1. Simple Invertebrates

2. Is a snake an invertebrate?

4. Characteristics Have no backbone Includes sponges Cnidarians (jellyfish) Flatworms Roundworms, segmented worms and mollusks (clams)

5. Sponges

6. Sketch Label top opening, flagella, body, pore

7. Sponges Are called FILTER FEEDERS because they take in dirty water and excrete clean water Use hairs called FLAGELLA to keep water moving through the sponge

8. Sponge Reproduction Asexual: use budding to grow an exact clone on their body Asexual: use regeneration to grow back body parts Sexual: use egg and sperm which combine to form larva

9. Sessile An organism that stays attached to one spot its entire life.

10. Flowers of the sea?

11. CNIDARIAN Jellyfish, Sea anemone, coral, hydra Sketch and label with tentacle and mouth

12. Heniochus acuminatus eating jellyfish

13. Sea anemone eating a jellyfish

14. This turtle thought the plastic bag was a jellyfish… he will probably die

15. Jellyfish Catch prey with stinging tentacles Sexually : use sperm and egg which combine to form larva

16. Jellyfish life cycle

17. Hydra Sketch, label tentacles, top opening

18. Hydra Catch prey with tentacle

19. Hydra Reproduce asexually by budding Describe: baby grows on parent, drops off

20. Invertebrates are not plants b/c They eat for energy Do not have chlorophyll

21. Radial Symmetry Body parts the same around a central point

22. Bilateral symmetry Body parts same on 2 sides of a line

23. Asymmetry No line of symmetry

24. Page 357

25. Flatworms Bodies are soft Examples are planaria and tapeworm Most are parasites, which lives on a host and harms it

26. Planaria Body: flat, triangular head Eat dead meat and plants Live in fresh water Move with cilia Reproduce by splitting in two Hermaphrodite: both male and female in the same body

27. Tapeworms Attach to host with hooks or suckers Gets digested food from host

29. Roundworms Found in soil, animals, plants, fresh water, and salt water (everywhere!!!!) Humans catch them by walking barefoot through contaminated fields

30. Roundworm mouthparts

31. Tick into skin, acting as a vector

32. Very graphic picture coming up

33. Guinea worm Dracunculiasis

34. Pinworm

35. Trichinella can be prevented by cooking meat thoroughly There is no cure

36. Dogs get heartworm by mosquito bites We call the mosquito a vector

37. Lumbricus terretrius

38. Anterior Above the waist

39. Posterior Below the waist

40. Dorsal On the back side

41. Ventral Belly side

42. #1 Setae 4 pr/segment…Bristles for movement (no skeletal system)

43. #2 Mucous Keep skin wet for respiration…No lungs (no respiratory system)

44. #3 Segments Movement… Holds organs in place Muscular system

45. #4 4a) Brain 4b) nerve cord Color same color Senses…Sends signals to organs Nervous system

46. #5 Mouth Ingestion Digestive system

47. #6 Pharynx Swallowing Digestive system

48. #7 Crop Stores food Digestive system

49. #8 Gizzards Grinds food Digestive system

50. #9 Intestine Digests and absorbs food into circ system Digestive system

51. #10 Anus Excretes castings (good fertilizer) Digestive system

52. #11 Aortic arches or hearts Color reddish Pumps blood Circulatory system

53. #12 Dorsal and ventral blood vessel Color reddish Takes blood to rest of body Circulatory system

54. #13 Nephridia 2 per segment Filters liquid waste, excretes it thru skin Excretory system

55. Worm Grunting To get worms to the surface, act like a mole Click here Why does it work? Click here