The Worms: Flat worms MHS Douglas 2021

The Worms: Flat worms MHS Douglas 2021

Note similarities to Porifera and Cnidaria, the gut being an open cavity, 3 layers: Ecto, Meso, Endo

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acoelomate means

• Having no fluid filled cavity

• having 3 layers

• having a brain

• having skin

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triploblastic means

• having no gut

• having 3 layers of tissue

• having a brain

• having a fluid filled cavity

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Flatworms are very small and simple. Many digest their food simply by

• absorbing it through diffusion

• putting their stomach through their anus

• using their stomach and gizzard

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flame cells excrete waste. This is similar to the function of

• lymph

• salivary glands

• heart

• kidneys

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Some of the sense organs/tissues of the flatworm include

• ganglia: nerve bundles

• eyespots

• ears

• chemical receptors/taste buds

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flatworms are often hermaphorditic meaning carrying both male and female sexual organs. This is similar to the term

• monoecious

• dioecious

• heterosexual

• asexual

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turbellaria are

• parasites

• independent fresh water worms

• colonial tubeworms

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trematoda are

• parasites

• free living freshwater worms

• colonial tubeworms

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cestoidea are

• parasites

• free living worms

• tubeworms

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Flatworms can reproduce sexually and asexually

• true

• false

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you can get tapeworms from

• swimming

• eating an infected host

• kissing

• virus

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Since food is digested by the host, these worms require very little digestive system

• trematodes

• cestoidea

• turbellaria