Week 3 Platyhelminthes and Mesozoans
Week 3 Platyhelminthes and Mesozoans Bio 330
University of Phoenix
Popular in Invertebrate Zoology
Popular in Animal Science and Zoology
This 4 page Class Notes was uploaded by Wolfjedi on Tuesday September 13, 2016. The Class Notes belongs to Bio 330 at University of Phoenix taught by Ginger Jacobs in Fall 2016. Since its upload, it has received 12 views. For similar materials see Invertebrate Zoology in Animal Science and Zoology at University of Phoenix.
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Date Created: 09/13/16
Platyhelminths and Mesozoans Matrix 1 BIO/330 Version 3 University of Phoenix Material Stephanie Dillard Platyhelminthes and Mesozoans Matrix Select 2 types of platyhelminthes and 2 types of mesozoans. Complete the matrix by filling in the columns for each type. Organism Class Characteristics Development Body shape is oval and Sexually very flat; has 2 hermaphroditic. Mating tentacles formed at the occurs when 2 Pink Flatworm head by the animal’s exchange sperm. Eggs Turbellaria (Prosthecareous (Rhabditophora) own body edge. 23 cm are laid isolatedly. Free roseus) in length. Pink with a floating larvae. white band in the middle and white stripes. 412 mm in length. Adult releases egg sacs 2mm in diameter. Flat, (proglottids) that are ribbonlike body shape. carried away by the No digestive system. digestive tract and No body cavity. released into the Appears segmented environment. Segments but is not. are ingested by cattle. Enzymes and acids Beef Tapeworm break down the (Taenia saginata) Cestoda proglottids. Eggs release and develop into oncosphere covered larvae that travel through circulatory system. End up in musculature which is eaten by humans. Gonochoristic. 5080 Males make brief micrometers in length. contact for fertilization. Body cells arranged in Embryos form 22 hours Rhopalura rings around central later. After embryos Orhonectida ophiocomae tube cell. form, female ruptures and dies, releasing larvae that disperse and find a new host. Copyright © 2016 by University of Phoenix. All rights reserved. Platyhelminths and Mesozoans Matrix 2 BIO/330 Version 3 Parasites of Central tube cell cephalopods. Has a contains axoblasts that long tube cell with cells give rise to either Dicyemia Rhombozoa arranged spirally asexual or sexual macrocephalum around it. larvae. Not much is known of the species. References CIB. (2005). “Prosthecareous roseus”. Retrieved from Dive Club of Biology at www.cibsub.cat/bioespecie_enprostheceraeus_roseus27951 Net Industries. (2016). Orthonectida; Physical characteristics. Retrieved from animals.jrank.org/pages/1465/OrthonectidansOrthonectidaPHYSICALCHARACTERISTICS.html Ramel, Gordon. (n.d.). “The Phylum Mesozoa”. Retrieved from www.earthlife.net/inverts/mesozoa.html Temanson, Caroline. (2009). Taenia sanginata. Retrieved from bioweb.uwlax.edu/bio203/s2009/temanson_caro/Life%20Cycle.htm Copyright © 2016 by University of Phoenix. All rights reserved. Parasitic and Nonparasitic Matrix 1 BIO/330 Version 3 University of Phoenix Material Stephanie Dillard Parasitic and Nonparasitic Matrix Select 2 types of parasitic worms and 2 types of nonparasitic worms. 1. Complete the matrix by filling in the columns for each type. 2. Answer the questions below the table. Describe how each Describe any Defining organism functions, problems or any Name Characteristics its host, and its benefits associated transmission. with these worms. Communicates through chemical receptors including ligandgated channels that respond to the internal Benefits: Allowed much environment of the host. genetic research about Protect themselves with localized immune the disease Ectothermic, Bilateral system signals within schistosomiasis and its Symmetry; Males larger prevention/cure. Blood Fluke than females; Prefers the host. Stimulated the (Schistosoma Has both an economy. mansoni) temperate and tropical intermediate (typically a freshwaters; freshwater snail) and a Problems: Parasite Gonochoristic; responsible for definitive host (human). schistosomiasis Most commonly they (affects nearly 300 infect a human host by piercing the skin and million people). moving into the blood stream. Mating pairs typically remain within the definitive host. Small, size ranges from Commonly found in Problems: Parasite can 3050mm in length. Has dogs. Is transmitted by cause infections in the a whiplike shape, feces and resides in the gastrointestinal tract of Whipworm (Trichuris vulpis) narrow anterior head, animal’s large intestine. the host, resulting in and a larger posterior Whipworm uses its tail weight loss, tail. Eggs are oval to move within the dehydration, anemia, shaped. animal. and death. Copyright © 2016 by University of Phoenix. All rights reserved. Parasitic and Nonparasitic Matrix 2 BIO/330 Version 3 Lives in tropical The worm stays under Benefit: The worms climates. Thin, white the sea floor and comes help to reduce the tentacles. Live on the Spaghetti Worm sea floor. Segmented out at night to feed. amount of dead (Eupolymnia bodies. Has inner and They gather dead organic matter on the crassicornis) organic matter and sea floor, reducing outer lips for food planktonic pollution from decaying gathering. Branched gills used for breathing. microorganisms. matter. Red color. Segmented. Secretes a coelomic fluid as a defense. Benefit: Reduces Nerve cords that act as Worm stays in damp decaying organic Red worm eyes. Clitellum that aids (Eisenia fetida) in reproduction. soils and feeds on matter. Great to use for organic waste. fishing and Nephrida, gizzard, composting. typhlosole and circulatory system. Has 5 hearts! Now that you have addressed parasitic and nonparasitic species consider the role beneficial nematodes play. 1. What is the purpose of beneficial nematodes? 2. Based on what you learned about beneficial nematodes, in your opinion, what is the most unique or interested aspect about them? Back up your choice with a reason and evidence. Copyright © 2016 by University of Phoenix. All rights reserved.
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