What includes flukes tapeworms and planarians?

Flukes, tapeworms, and planarians are all types of flatworms, belonging to the phylum Platyhelminthes. These organisms are characterized by their flattened bodies and lack of specialized respiratory and circulatory systems. Flukes are typically parasitic, tapeworms are known for their segmented bodies and also parasitize hosts, while planarians are usually free-living and can regenerate lost body parts. Collectively, they exhibit a wide range of ecological roles and adaptations.