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Biology 1204 > Platyhelminthes > Flashcards

Platyhelminthes Flashcards

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1
Q

What does Platyhelminthes mean?

A

Greek :
Platy = flat
Helmins = worm

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2
Q

How many germ layers does Platyhelminthes have?

A

Triploblastic = 3 germ layers

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3
Q

What kind of coelom does Platyhelminthes have?

A

Acoelomate = no body cavity

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4
Q

What symmetry is Platyhelminthes?

A

Bilateral

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5
Q

What is special about the bodies of Platyhelminthes?

A

It is dorsoventrally flattened

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6
Q

What are the 2 things to describe the epidermis layer of Platyhelminthes?

A

1- cellular

2- syncytial (single cell mass with multiple nuclei)

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7
Q

What are the 4 classes of Platyhelminthes?

A

1- Turbellaria
2- Cestoda
3- Monogena
4- Trematoda

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8
Q

Explain the nervous system of the Class Turbellaria of the phylum Platyhelminthes

A

Have nerve net = cerebral ganglion and 1-3 pairs of nerve chords

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9
Q

What is the sexual reproduction of the Class Turbellaria of the phylum Platyhelminthes

A

Hermaphroditic

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10
Q

What can be said about the epidermis layer of the Class Turbellaria of the phylum Platyhelminthes (3 things it contains)

A

It is ciliated = has secreting cells and rehabdites and rhabdoids that release thick mucus to coat body

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11
Q

What is the order of the Class Turbellaria of the phylum Platyhelminthes?

A

Tricladida

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12
Q

What does the gut of the order Tricladida of the Class Turbellaria of the phylum Platyhelminthes have?

A

3 distinct branches

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13
Q

What are the freshwater members of the order Tricladida of the Class Turbellaria of the phylum Platyhelminthes known as?

A

Planaria

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14
Q

What are the 2 families of the order Tricladida of the Class Turbellaria?

A

1- Planaridae

2- Dugesiidae

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15
Q

What is an example of the family Planaridae of the Order Tricladida of the Class Turbellaria?

A

Planaria

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16
Q

What is an example of the family Dugesiidae of the Order Tricladida of the Class Turbellaria? Used for?

A

Dugesia

Used for regeneration studies

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17
Q

What are the 5 things that the Class Turbellaria of Platyhelminthes respond to?

A

Light, contact, chemicals, food and water currents

18
Q

What is the subclass of the Class Cestoda of the phylum Platyhelminthes?

A

Eucestoda

19
Q

What is the subclass Eucestoda of the Class Cestoda?

A

True tapeworm

20
Q

What are the orders and families in the subclass Eucestoda of the Class Cestoda based on?

A

Based on scolex morphology

21
Q

What are the 2 families to know of the subclass Eucestoda of the Class Cestoda?

A

1- Taeniidae

2- Hymenolepididae

22
Q

What are the 2 examples of the family Taeniidae of the subclass Eucestoda of the Class Cestoda? What are they used for?

A

Taenia, Echinococcus

Medical importance

23
Q

What are the family Hymenolepididae of the subclass Eucestoda of the Class Cestoda?

A

Parasites of birds and mammals

24
Q

What is an example of the family Hymenolepididae of the subclass Eucestoda of the Class Cestoda? What is it used for?

A

Hymenolepsis diminuta - model species for medical research

25
Q

Where can Hymenolepsis diminuta be found?

A

Found in rodents - rat tapeworm

26
Q

What is the only thing to know about the class Monogena?

A

That they are simultaneous hermaphrodites

27
Q

What are the class Trematoda known as?

A

Flukes

28
Q

What is one of the subclasses of the class Trematoda?

A

Digenea

29
Q

What are 3 orders of the subclass Digenea of the class Trematoda?

A

1- Streigedida
2- Echinostomida
3- Opisthorchiida

30
Q

What is the family of the order Streigedida of the subclass Digenea of the class Trematoda?

A

Schistosomatidae

31
Q

What is an example of the family Schistosomatidae of the order Streigedida?

A

Schistosoma = blood flukes

32
Q

Where are blood flukes (Schistosoma) of the family Schistosomatidae found?

A

2 hosts - snails or vertebrates = found in the blood vessels of mammals and birds

33
Q

What is an example of the the Order Echinostomida of the subclass Digenea of the class Trematoda?

A

Fasciola

34
Q

Where are the Order Echinostomida of the subclass Digenea of the class Trematoda found?

A

Parasites of the cloaca (type of body cavity) and intestines of birds/mammals

35
Q

What is special about the life cycle of the the Order Opisthorchiida of the subclass Digenea of the class Trematoda?

A

Requires 3 hosts

36
Q

What is the family of the Order Opisthorchiida of the subclass Digenea of the class Trematoda?

A

Opisthorchiidae

37
Q

What is an example of the family Opisthorchiidae of the Order Opisthorchiida of the subclass Digenea of the class Trematoda?

A

Clorchis sinensis

38
Q

What are the family Opisthorchiidae of the Order Opisthorchiida known as? Where are the found?

A

Chinese liver flukes - infected 30 million people

Live on file ducts of human hosts

39
Q

If the Class Trematoda is parasitic, where are they found?

A

Endoparasites of vertebrates

40
Q

What is the class Trematoda structurally similar too? How is it different?

A

Similar to the Class Turbellaria but has no external cilia - has cuticle instead

Biology 1204 (14 decks)

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