BIO 1106 Study Guide - Midterm Guide: Dugesia, Cestoda, Arthropod Cuticle
28 Nov 2016
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Cellular mesoderm in addition to ecto and endoderm. acoelomate. triploblastic, have organs, and bilaterally symmetrical w distinct anterior and posterior ends. dorsoventrally compressed free living organisms w primitive sense organs. Parasitic, oval-bodied worms that are only a few mm long. infect vertebrates and are either endoparasites or ectoparasites. lack an epidermis but have an epicuticle. ventral surface usually has two suckers and the oral sucker surrounds the mouth. Opisthorchis: oriental liver uke. attaches to bile duct and releases eggs that move though the digestive system of host and exit w feces. larvae develop in snails and sh. Fasciola: sheep liver uke, rarely infects humans. sucks food through muscular pharynx located at mouth. Taenia: infects thru uncooked pig meat. can be up to 10 m long. Ascaris: large nematode that infects intestinal tract of humans and other vertebrates. males are smaller than females and have a hooked posterior. Turbatrix: vinegar eel . moves p quick with a whiplike motion.
