Wikimedia
Wikipedia: Platyhelminthes
Wikipedia offers information on the phylum, platyhelminthes, or flatworms. Includes a scientific classification chart and a list of the orders of the phylum.
Regents of the University of Michigan
Animal Diversity Web: Phylum Platyhelminthes
The Animal Diversity Web offers a site on the phylum platyhelminthes, or flatworms. Includes a section on reproduction.
BiologyWise
Biology Wise: Parasitic Flatworms
Describes types of flatworms that are parasitic to humans and animals and what their life cycle looks like. Two or more hosts are needed for them to complete their life cycle.
BiologyWise
Biology Wise: What Are the Different Types of Flatworms
Describes the basic characteristics of three of the major kinds of flatworms, including tapeworms, planarians, and flukes.
BiologyWise
Biology Wise: Platyhelminthes Examples
Describes the characteristics and anatomy of platyhelminthes and provides a list of examples from the classes Turbelaria, Trematoda, Cestoda and Monogenea.