1. Bell work 1.

5. General Reminders If you did not pass your exam remember you must come in to AST to correct your test and retest for a higher grade. Saturday School 4/2 9:00-12:00 Test date 4/7 Journals Due 4/7 EOC Tutoring Tuesday 7:35-8:15 in Mrs. Owens’ Room 1241 Tuesday 3:50-4:30 in Mrs. Cochrane’s Room 1228 Wednesday 7:35 – 8:15 in Coach Rich’s Room 1107 Thursday 7:35-8:15 in Mrs. Schneider’s Room 1240 Thursday 3:50-4:30 in Mrs. Schneider’s Room 1240

6. QUIZ Clear your desks of everything Use CAPITAL letters please Keep your answers covered If you need to make up a quiz due to an absence… come see me Tues or Thurs during AST Flip it over when you are finished and hang on to it.

7. Today’s Objective: OBJECTIVES: Describe and Explain the characteristics of the different worm phyla

8. The Worms Phylum Platyhelminthes Phylum Nematoda Phylum Annelida

9. Phylum Platyhelminthes = Flatworms Ganglia Eye spot Flame cells Pharynx Mouth Gastrovascular cavity Nerve cord Special Structures: Ganglia – group of nerve cells Flame Cells - specialized cells that remove waste that remove waste materials materials Pharynx - Food is drawn through this tube this tube

10. Phylum Platyhelminthes = Flatworms Body symmetry: Bilateral Body cavity: acoelomate Respiratory, Circulatory: diffusion Excretory: flame cells

11. Response: ganglia (simple) Feeding: carnivores or parasitic Movements: Cilia and muscle cells Reproduction: sexual (hermaphroditic)

12. Examples: Planaria, Fluke, Tapeworm

13. Tapeworms The largest tapeworms can grow up to 58ft long You can become contaminated by eating infected food They harm what they are living in by stealing vital nutrients. (House episode)

14. Flukes Humans ingest the eggs of flukes by eating raw fish, or eating the plant stalks of bamboo or other things that grow in a moist fresh water. Most common in Asia

15. Phylum Nematoda = Round Worms anus mouth pseudocoelom Retract piercing device intestine pharynx Special Structures: Sense organs - neuron that reacts to a specific stimulus, such as light Dioecious - each organism is only one sex; separate sexes Hydrostatic skeleton - layers of circular and longitudinal muscles, together with the water in the gastrovascular cavity, that enable movement

16. Phylum Nematoda = Round Worms Body symmetry: Bilateral Body cavity: Pseudocoelomates Respiratory, Circulatory, Excretory: diffusion Response: ganglia (simple), sense organs (detect chemicals)

17. Feeding: parasitic Movements: muscles, hydrostatic skeleton Reproduction: sexual  dioecious

18. Examples: trichinosis, filarial worms, Ascaris, hookworms Ascaris, hookworms

19. Trichinosis Caused by eating raw pork Biblical reasoning to not eat pork

20. Ascaris Effect the intestine and can cause a blockage. Most symptoms are diahhrea, nausea, etc.

21. Filarial worms Contracted by horse fly or deer fly also causes elephantitis

22. hookworms Humans can contract hookworms by walking barefoot on contaminated soil. Also by eating improperly washed vegetables

23. Pin worm Scratching infected area and touching someone else and passing on eggs. Then they are ingested and the process occurs again.

24. Phylum Annelida = Segmented Worms Special Structures: ganglia nephridia setae anus metameres mouth brain gizzard crop Setae – external bristles for movement Nephridia – excretory organ that filters fluid in the coelom (primitive kidney) Clitellum – secretes a mucus ring into which eggs and sperm are released and then forms a protective cocoon Metameres – body segments Septa – thin walls that separate body segments

25. Phylum Annelida = Segmented Worms Body symmetry: Bilateral Body cavity: Coelomates Respiratory: gills (aquatic) or through skin Circulatory: closed circulatory system

26. Excretory: Nephridia Response: Brain with dorsal & ventral nerve cords, some sense organs Feeding: aquatic – filter feeders; detritivores; parasitic Movements: satae, muscles, hydrostatic skeleton Reproduction: sexual & some hermaphroditic

27. Examples: earthworm & leech

28. leeches Attach to their host until they are full and then fall off to digest. In some cases a leech carries the diseases from prior hosts and infects the new host (HIV, Hepatitis).