Platyhelminthes

• what groups is platyhelminthes in bilateria (tripblastic) protostomia lophotrochozoa
• characteristics of tripoblastic animals bilateral symmetry has cephalization has directed movement 3 germ layers 2 major groups (protostomia and deuterostomia)
• acoelomate no coelem only gut (endoderm), parenchyma (mesoderm)
• pseudocoelomate fake coelem, no mesentry and mesodermal peritoneum
• body of platyhelminthes slender, broadly leaflike, long, or ribbon-like
• lifestyle of platyhelminthes free living or parasitic
• T/F: the group has no single unique characteristic true
• what are the groups under phylum platyhelminthes tubellaria, cestoda, trematoda, monogenea
• body form of platyhelminthes - flatenned dorsoventrally - acoelomate (parenchyma) - incomplete gut (absent in cestoda) - cellular or syncytial epidermis
• what is the origin of the muscular system in platyhelminthes mesodermal
• what does the nervous system of platyhelminthes anterior ganglia with longitudinal nerve cords
• what are the sense organs of platyhelminthes statocysts and ocelli
• how do platyhelminthes reproduce? asexual: fragmentation sexual: simultaneous hermaphrodite, internal fertilization, complicated life cycle
• what is used for osmoregulation flame cells or protonephridia
• what systems does platyhelminthes lack respiratory, circulatory, skeletal
• what type of parasite is turbellaria - free living (mostly aquatic)
• T/F: the surface of turbellaria is not ciliated false. it is ciliated
• what do the epidermis of turbellaria possess rhabdites that release mucus for coating with dual-gland adhesive organs
• digestive system of turbellaria either protusible pharynx or proboscis
• T/F: turbellaria is regenerative true
• order macrostomida - class turbellaria - intestinal or living between sand and water sediments - numerous adhesive glands and rhabdites but no statocysts ex. Macrostomum lignano
• order tricladida class: characteristic: other names: - class turbellaria - has a gut with 3 distinct branches - freshwarer planarians - terrestrial triclads
• what type of parasite is cestoda endoparasites
• what is the epidermis of cestoda syncytial tegument
• outer surface of cestoda is ourfolded into numerous cytoplasmic projections called: proglottids that increase surface area for absorption
• what is the anterior end of cestoda scolex
• whats another name of cestoda tapeworms
• does cestoda have digestive system no, only well developed muscles
• what is the surface of cestoda covered with microtriches (similar to microvilli of vertebrate small intestine)
• chain of proglottids strobila, for sexual reproduction, containing both male and female reproductive organs
• is class cestoda monoecious yes
• order pseudophyllidea - class cestoda - widespread flatworms mostly parasitize marine and freshwater fishes
• fish tapeworm - diphyllobothrium latum - abdominal pain and weightloss - ingesting undercooked fish
• order cyclophyllidea - class cestoda - infects pets, people, livestock - has 4 suckers
• pork tapeworm - taenia solium - pigs as intermediate host - eating undercooked pork - can cause blindness and paralysis
• beef tapeworm - taenia saginata - order cyclophyllidea - undercooked beef - lack rostellum and hooks
• unilocular hydratid - echinococcus granulosus - order cyclophyllidea - reach adulthood in dogs - no more than 5 proglottids
• dog tapeworm - diplydium caninum - parasitixe cats and dogs - can infect humans who ingest the intermediate hosts (fleas and lice)
• what type of parasites are monogenea? ectoparasites of fishes
• what is the highly specialized posterior end of monogenea opisthaptor for attachment