BIOL110 Study Guide - Final Guide: Taenia Saginata, Clitellata, Digenea
14 Dec 2017
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Document Summary
Flame cells have flagella and villi to filter out waste and excess water. Mostly sexual, monoecious, cocoon that hatches outside parent, direct development. Schistostoma are dioecious, female fits inside groove of male. Phylum annelida taenia saginata (beef) and taenia solium (pork) Glans cells infect host and form cysts. Complex nerve system allows segments to function semi- independently. Eggs fertilize to form larva, forms oncosphore, forms juvenile, forms cystericercus, forms adult. Includes oligochaetes and hirudinida contractions to avoid predators. 4 setae/segment and muscles for peristaltic movement. Vnc travels length of body beneath gut. Tubefex sp. lives in anoxic sediment as parasite. Bloodsuckers have cutting plates and anticoagulants/ anesthetics. Gas exchange at body surface, no organs. Important parasites sensing env, and forming musculature with parapodia. Tentacles filter h2s in water and feed it to bacteria to make sugars. Syncytial hypodermis secretes cuticle made of collagen. Free living are tactile sensilla predators or herbivores. Cilia and palps direct food to mouth.
