The Platyhelminthes (Flatworms): Tapeworms & Flukes

"The Platyhelminthes (Flatworms): Flukes. Class Digenea (Trematoda) - the flukes
. Trematodes are parasites of vertebrates. They have complex life cycles ..."

http://www.austincc.edu/mlt/clin3/ParasitTrematodesSummer2012.ppt