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Bell work

Bell work. 1. 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

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Bell work

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  1. Bell work 1.

  2. 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

  3. QUIZ Clear your desks of everything Use CAPITALletters 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.

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

  5. The Worms Phylum PlatyhelminthesPhylum NematodaPhylum Annelida

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

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

  8. Phylum Platyhelminthes = Flatworms • Response:ganglia (simple) • Feeding:carnivores or parasitic • Movements: Cilia and muscle cells • Reproduction:sexual (hermaphroditic)

  9. Phylum Platyhelminthes = Flatworms • Examples:Planaria, Fluke, Tapeworm

  10. 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)

  11. 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

  12. Phylum Nematoda = Round Worms mouth Retract piercing device Special Structures: pharynx 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 Sense organs - neuron that reacts to a specific stimulus, such as light intestine pseudocoelom anus

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

  14. Phylum Nematoda = Round Worms • Feeding:parasitic • Movements: muscles, hydrostatic skeleton • Reproduction:sexual  dioecious

  15. Phylum Nematoda = Round Worms • Examples:trichinosis, filarial worms, Ascaris, hookworms

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

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

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

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

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

  21. Phylum Annelida = Segmented Worms • Special Structures: anus 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 Septa– thin walls that separate body segments setae Setae– external bristles for movement Metameres– body segments metameres gizzard crop clitellum mouth brain nephridia ganglia

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

  23. Phylum Annelida = Segmented Worms • 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

  24. Phylum Annelida = Segmented Worms • Examples: earthworm & leech

  25. 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).

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