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Unformatted text preview: Involving both vertebrate,& invertebrate hosts Life cycle of a Schistosome Fluke Humans definitive host Eggs are released into the bladder If eggs reach freshwater, hatches into swimming larvae called miracidia Burrows into aquatic snail Fork tailed larvae produced Leave snail, swim until encounter w/ human skin Attach to skin, enter body, and migrate to circulatory system where they mature Repeat Class Cestoidea Tapeworm Lack a mouth and digestive tract Absorb nutrients directly across their body wall Complex life cycles Adults contain proglottids Contains one or two complete sets of reproductive structures More Ask? Life cycle of beef tapeworm Most common tapeworm of humans Eggs in feces Eggs or proglottids ingested by cattle Hatches, and penetrates intestine to bloodstream Bloodstream to skeletal muscles Human eats infected meat Scolex attaches to human intestinal wall Tapeworm matures Repeat...
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- Spring '08
- Annelid, Flatworm, Phylum Platyhelminthes, Turbellaria, Trematoda, Class Cestoidea Tapeworm