While most of the Platyhelminthes are free living or endoparasites, which one of the following taxa has an ectoparasitic life cycle?

The members of the phylum Platyhelminthes are called flatworms because their bodies are flattened

The cells that secrete mucus in the epidermis of the Turbellaria are called

The body of the parasisitc flatworms is covered in a syncytial layer called

The cells that form a meshwork filling the spaces between the muscles and organs that develops from the mesoderm is called

A cuticle is different from a tegument in that a cuticle is ______ while a tegument is _______.

While the previous phyla have used intracellular digestion, within these three phyla extracellular digestion is the norm. Extracellular digestion means that

Another name for a protonephridium is a

The protonephridia function in

The nervous system of the flatworms has sensory, motor, and association nerves, and it is organized into a ______ pattern.

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