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Branching gastrovascular cavity is part of what phylum? Platyhelminthes What phylum has bilateral symmetry? Platyhelminthes What phylum has body organs? Platyhelminthes What are the three sidtinct body layers of Flatworms? Ectoderm Endoderm Mesoderm Parasites are what? Free- Living Planaria is what? Free- Living What contains earlike structures called Auricles that contain chemoreceptors? Pylum Platyhelminthes What do Chemoreceptors do? Taste the enviroment and mechanoreceptors- Detect physical cantach and water currents Eyespts are? Photreceptors that detect light Flatworms feed how? by sicking food into te pharynx Waste is removed how? By sicking in water and blowing it out the mouth Most digestion is extracellular are what? Flatworms Gas exchange is by? Diffusion Can excete water and nitrogenous waste through a network of what? Tubules that empty through pores Phylum Platyhelminthes has what kind of worms? Flatworms Two cerebral ganglia function as a promitive brain do what? Give them limited learning ability Reproduces how? Sexually and Asexually Sexually Hermaphroditic Two come together and? Exchange Sperm Asexually by great powers of what? Regeneration Flukes are? Parasites Most are what? endoparasites What required two host to go through a complete life cycle?` Flatworms THey live as a sexually mature adult Defintive Host And host other than when they are not sexually mature Intermediate host Acoelomates means? With out coelom