phylum platyhelminthes (lophotrochozoan)

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Last updated 12:20 AM on 4/14/26
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16 Terms

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food

predators and scavengers, some parasitic

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most have

branching gastrovascular cavity

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mouth

feeding and expelling water

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digestion

extracellular (release enzymes then take in)

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flatworms come with

excretory system with network of tubules attached to flame cells (like kidneys)

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pair of

lateral nerve cords

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2

cerebral ganglia (photo and chemosensors)

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circulatory or digestive system

none

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monoecious

internal fertilization

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planaria

flatworm with one opening for mouth and anus, excretory system with flame cells attached to excretory pores

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asexual repro

fission; some capable of regeneration

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ciliated

ventral epidermis

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4 classes

turbellaria, monogeneans, trematoda, cestoda

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monogeneans

ectoparasites of fish, most seq hermaphroditic

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trematoda

internal parasites of mollusks and humans

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cestoda

internal parasites; tapeworm