Chapter 27.3 Flashcards

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1
Q

What is the phylum of flatworms?

A

Platyhelminthes

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2
Q

What kind of symmetry do flatworms have?

A

Bilateral

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3
Q

How many tissue layers do flatworms have?

A

Three

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4
Q

What is the word used to describe the nerve arrangement in flatworms?

A

Cephalization- concentration of nerve tissue at an animals “head” end

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5
Q

What type of tissue allows flatworms to become more active hunters?

A

Muscle

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6
Q

How do flatworms get energy?

A

Other living things, they are carnivores

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7
Q

How many body openings do flatworms have?

A

One

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8
Q

How do flatworms transfer gases?

A

Through diffusion; they do not have a respiratory or a circulatory system

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9
Q

How can flatworms reproduce?

A

Asexually or sexually

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10
Q

How would you describe the gender of most flatworms?

A

Hermaphroditic

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11
Q

What is odd about the reproduction of Planaria?

A

They can regenerate body parts

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12
Q

What is an endoparasite?

A

A parasite that lives inside of your body

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13
Q

What is an ectoparasite?

A

A parasite that lives outside of your body

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14
Q

What is an acoelomate and what is an example?

A

Organism with no space between their body wall and their gut, flatworm

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15
Q

What are the three major groups of flatworms and are they free-living or parasitic?

A

Turbellarians- free
Tapeworms- parasitic
Flukes- parasitic

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16
Q

Where do turbellarians live?

A

Marine

17
Q

What are proglottids?

A

New sections of flatworms that produce both types of reproductive cells

18
Q

What is Schistosomiasis?

A

A disease caused by flukes that is common in Africa, Asia, South America, and some Caribbean islands that is spread by water

19
Q

What is the third tissue layer that tapeworms have that sponges and cnidarians do not?

A

Mesoderm

20
Q

How are the tissues of tapeworms arranged?

A

Organs

21
Q

Where do Planarians live?

A

Freshwater

22
Q

What are teguments?

A

A thick protective layers of cells