A non-parasitic class in it is Turbellaria, which includes planarians, and common parasitic organisms include flukes and tapeworms.
One class in this phylum uses a reproductive structure called Laurer's canal. The life cycle of that class in this phylum includes the stages miracidia and cercariae. The hermaphroditic species P. hancockanus in this phylum engages in penis fencing to determine which organism will become the father. Its members cause the infection schistosomiasis. This bilaterally symmetric, triploblastic, acoelomate phylum contains bundles of flame cells called protonephridia that regulate excretion. A non-parasitic class in it is Turbellaria, which includes planarians, and common parasitic organisms include flukes and tapeworms. For 10 points, name this phylum of flatworms.
One class in this phylum uses a reproductive structure called Laurer's canal.
Platyhelminthes [or flatworms until it is read]