The document summarizes key facts about the phylum Platyhelminthes: 1) Platyhelminthes includes flatworms such as tapeworms and flukes. They are bilateral and mostly parasitic, infecting over 200 million people annually. 2) They have a ribbon-like shape, absorb nutrients through their skin, and lack digestive and circulatory systems. 3) Reproduction varies between sexual and asexual. Many require multiple hosts to complete their lifecycles, posing risks to humans who consume undercooked foods contaminated with parasites.

1. Platyhelminthes Lauren Wagner and Madison Page 5-19-09 3 rd Period Tapeworm Hymenolepis diminuta Fluke Megaptera Novaeangliae

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