Platyhelminthes

Question 1

What does Platyhelminthes mean?

Answer 1

Greek :
Platy = flat
Helmins = worm

Question 2

How many germ layers does Platyhelminthes have?

Answer 2

Triploblastic = 3 germ layers

Question 3

What kind of coelom does Platyhelminthes have?

Answer 3

Acoelomate = no body cavity

Question 4

What symmetry is Platyhelminthes?

Answer 4

Bilateral

Question 5

What is special about the bodies of Platyhelminthes?

Answer 5

It is dorsoventrally flattened

Question 6

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

Answer 6

1- cellular

2- syncytial (single cell mass with multiple nuclei)

Question 7

What are the 4 classes of Platyhelminthes?

Answer 7

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

Question 8

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

Answer 8

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

Question 9

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

Answer 9

Hermaphroditic

Question 10

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

Answer 10

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

Question 11

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

Answer 11

Tricladida

Question 12

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

Answer 12

3 distinct branches

Question 13

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

Answer 13

Planaria

Question 14

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

Answer 14

1- Planaridae

2- Dugesiidae

Question 15

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

Answer 15

Planaria

Question 16

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

Answer 16

Dugesia

Used for regeneration studies

Question 17

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

Answer 17

Light, contact, chemicals, food and water currents

Question 18

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

Answer 18

Eucestoda

Question 19

What is the subclass Eucestoda of the Class Cestoda?

Answer 19

True tapeworm

Question 20

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

Answer 20

Based on scolex morphology

Question 21

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

Answer 21

1- Taeniidae

2- Hymenolepididae

Question 22

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

Answer 22

Taenia, Echinococcus

Medical importance

Question 23

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

Answer 23

Parasites of birds and mammals

Question 24

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

Answer 24

Hymenolepsis diminuta - model species for medical research

Question 25

Where can Hymenolepsis diminuta be found?

Answer 25

Found in rodents - rat tapeworm

Question 26

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

Answer 26

That they are simultaneous hermaphrodites

Question 27

What are the class Trematoda known as?

Answer 27

Flukes

Question 28

What is one of the subclasses of the class Trematoda?

Answer 28

Digenea

Question 29

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

Answer 29

1- Streigedida 2- Echinostomida 3- Opisthorchiida

Question 30

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

Answer 30

Schistosomatidae

Question 31

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

Answer 31

Schistosoma = blood flukes

Question 32

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

Answer 32

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

Question 33

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

Answer 33

Fasciola

Question 34

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

Answer 34

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

Question 35

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

Answer 35

Requires 3 hosts

Question 36

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

Answer 36

Opisthorchiidae

Question 37

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

Answer 37

Clorchis sinensis

Question 38

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

Answer 38

Chinese liver flukes - infected 30 million people | Live on file ducts of human hosts

Question 39

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

Answer 39

Endoparasites of vertebrates

Question 40

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

Answer 40

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