1 / 23

Parazoa no true tissues

Radiata. Bilateria. Eumetazoa. Parazoa no true tissues. Multicellularity. Quiz ( Champaca ). What is the literal meaning of Platyhelminthes? A muscular tube used to suck food into the gastrovascular cavity. Platyhelminthes depend on what process to respire?

tal
Download Presentation

Parazoa no true tissues

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Radiata Bilateria Eumetazoa Parazoano true tissues Multicellularity

  2. Quiz (Champaca) • What is the literal meaning of Platyhelminthes? • A muscular tube used to suck food into the gastrovascular cavity. • Platyhelminthes depend on what process to respire? • What is the term used to describe the three germ layers? • True or False: Platyhelminthes can be parasitic.

  3. Phylum PlatyhelminthesFlatworms • with tissues  organ systems • triploblastic • bilaterally-symmetric • with cephalization • acoelomates Pseudocerussapphirinus Pseudobicerosbedfordi Phrikoceros sp. Acanthozoonsp. Marine flatworms of the Philippinesfrom http://www.rzuser.uni-heidelberg.de/

  4. Phylum PlatyhelminthesFeeding in free-living flatworms • carnivores or detritivores • incomplete digestive system • highly-branched GVC • pharynx • external  internal digestion, diffusion http://www.southtexascollege.edu/nilsson/4_GB_Lecture_figs_f/4_GB_23_AnimaliaInvert_Fig_f/Platyhelminthes_Planaria_2.GIF

  5. Phylum PlatyhelminthesFeeding in parasitic flatworms • feed on blood, tissue fluids, pieces of cells within host • no need for complex digestive system • Clonorchissinensis(human liver fluke) • Taeniasaginata(beef tapeworm) http://www.esu.edu/~milewski/intro_biol_two/lab__10_platy_nemat/images/clonorchis.jpg, http://www.microbeworld.org/images/stories/twip/clonorchis_lifecycle.jpg

  6. Phylum PlatyhelminthesRespiration, circulation, excretion • diffusion • flame cells - remove nitrogenous metabolic wastes and excess H2O http://faculty.uca.edu/johnc/PlanarianPronephr.gif

  7. Phylum PlatyhelminthesResponse • ganglia • nerve cords (ladder-like) • eyespots • sensory cells

  8. Phylum PlatyhelminthesMovement • Muscles • Ventral epidermal cilia + mucus http://mlitvaitis.unh.edu/K-12Primer/muscles.jpg

  9. Phylum PlatyhelminthesReproduction Free-Living Fission and regeneration Hermaphroditism and cross-fertilization http://images.tutorvista.com/content/reproduction/fragmentation-in-planaria.jpeg, http://users.design.ucla.edu/~tatsuyas/classes/152BC/ex3/planaria.jpg, http://www.visualdiving.com/pics/uw962_35.jpg

  10. Phylum PlatyhelminthesReproduction Parasitic Complex life cycles with both asexual and sexual reproduction (Schistosomajaponicum) http://siera104.com/images/bio/flatroundrotifers/shistomsoma.jpg

  11. http://www.e-cleansing.com/wp-content/uploads/2009/12/laiuss1.jpghttp://www.e-cleansing.com/wp-content/uploads/2009/12/laiuss1.jpg

  12. Tapeworm structures • Long, flat, parasitic worms • Structure • Scolex: head w/ suckers, hooks • Proglottids: body segments that produce both sperm and egg http://www.ohiohealth.com, http://www.marlin.ac.uk/images/taxonomy_descriptions/Cestoda.jpg

  13. http://www.dpd.cdc.gov/dpdx/images/ParasiteImages/S-Z/Taeniasis/Taenia_LifeCycle.gifhttp://www.dpd.cdc.gov/dpdx/images/ParasiteImages/S-Z/Taeniasis/Taenia_LifeCycle.gif

  14. Phylum NematodaRoundworms • with tissues  organ systems • “tube within a tube” • triploblastic • bilaterally-symmetric • with cephalization • pseudocoelomates http://mycozynook.com/18_3bodyplanp.jpg , http://sharon-taxonomy2009-p2.wikispaces.com/file/view/nematode.gif/99304909/nematode.gif

  15. Phylum NematodaFeeding in nematodes • carnivores/ detritivores or parasites • complete digestive system • internal digestion, diffusion http://images.tutorvista.com/content/animal-kingdom/roundworm-anatomy.jpeg

  16. Phylum NematodaRespiration, circulation, excretion • diffusion through epidermis and cuticle • with an excretory canal and pore http://images.tutorvista.com/content/animal-kingdom/roundworm-anatomy.jpeg

  17. Phylum NematodaResponse • circular nerve ring  primitive brain • dorsal and ventral nerve cords

  18. Phylum NematodaMovement • muscles • hydrostatic skeleton http://www.baileybio.com/plogger/images/ap_biology/animal_diversity_project_-_must_cite_your_textbook_/nematoda_2.jpg

  19. Phylum NematodaReproduction Sexual: Internal fertilization Asexual: Parthenogenesis unfertilized egg develops into an adult organism without sperm fertilization http://sharonapbio-taxonomy.wikispaces.com/file/view/nematode.jpg/50864359/nematode.jpg, http://www.mansfield.ohio-state.edu/~sabedon/black11_files/image023.jpg

  20. Phylum NematodaReproduction Parasitic Complex life cycles (Trichinellaspiralis) http://siera104.com/images/bio/flatroundrotifers/shistomsoma.jpg

  21. Phylum NematodaReproduction Parasitic Complex life cycles Filarial worms (Brugiamalayi) threadlike blood and lymph vessels of birds and mammals vector: biting insects with symbiotic bacteria Wolbachia

  22. Phylum NematodaReproduction Parasitic Complex life cycles Ascarisspp. causes malnutrition in >1B people http://www.metapathogen.com/IMG/ascaris-life-cycle.png

  23. Phylum NematodaReproduction Parasitic Complex life cycles Hookworms Infects ~1/4 of the world’s population

More Related