Phylum Platyhelminthes

Question 1

Commonly called _

Answer 1

flatworms

Question 2

Platyhelminthes germ layer

Answer 2

Endoderm, mesoderm, ectoderm

Question 3

Bilateral symmetry first appears in _

Answer 3

Platyhelmithes

Question 4

What is cephalization?

Answer 4

Possessing a head where central nervous system (cerebral ganglion) and sensory organs are located

Question 5

Can a planaria continuously eat? Why or why not?

Answer 5

Cannot due to the fact that pharynx acts as both throat and anus

Question 6

what feature is missing in flatworms?

Answer 6

anus

Question 7

what organism is intermediate host for Trematoda repro?

Answer 7

snail

Question 8

what feature is critical to tapeworm repro?

Answer 8

proglottid

Question 9

what is one common way humans contract tapeworms

Answer 9

eating uncooked meat

Question 10

anterior

Answer 10

mouth

Question 11

posterior

Answer 11

booty

Question 12

dorsal

Answer 12

back

Question 13

ventral

Answer 13

front

Question 14

In flatworms what is evolutionarily significance

Answer 14

flattened dorsoventrally

Question 15

How are nerve cords found in this phylum

Answer 15

in pairs

Question 16

in freshwater flatworms how many lateral nerve cords are there connected to cerebral ganglia

Answer 16

one

Question 17

How does osmoregulation occur in this phylum? (what type of cells are lined with _)

Answer 17

flame cells lined with cilia drive fluids through a series of tubules which open to outside through a series of pores

Question 18

How does excretion and respiration happen in this phylum?

Answer 18

simple diffusion
flattened body aids in process which is easier for diffusion

Question 19

what in Class turbellaria

Answer 19

free living flatworms

Question 20

whats in class monogenea

Answer 20

small ectoparasites on fish

Question 21

what is in class Trematoda and what kind of parasitism

Answer 21

flukes, endoparasites

Question 22

class cestoda

Answer 22

tapeworms

Question 23

example organism for class turbellaria

Answer 23

Planaria (genus Dugesia)

Question 24

digestive system of turbellaria

Answer 24

y shaped with eversible pharynx for feeding (mouth but no anus)

Question 25

turbellaria reproduction

Answer 25

asexual by fission sexual via syngamy

Question 26

are animals of this phylum virtually all monoecious or diecious?

Answer 26

monoecious

Question 27

What class includes ectoparasited

Answer 27

monogenea

Question 28

Monogenea can be found where on host?

Answer 28

found on external surface of fish, amphibians, and reptiles

Question 29

how do monogenea attach to host?

Answer 29

via a haptor

Question 30

monogenean repro

Answer 30

sexual only 1 offspring/egg

Question 31

class Trematoda how many hosts in life cycle?

Answer 31

2 or 3

Question 32

For trematoda the definitive host is almost always a

Answer 32

vertebrate

Question 33

What is the intermediate host for trematoda

Answer 33

snail

Question 34

Adult human liver fluke

Answer 34

clonorchis sinesis

Question 35

Explain life cycle of clonorchis

Answer 35

human poops out egg contining miracidium larvae>miracidium hatch after being eaten by snail>goes through sporocyst (shizogony stage)>then feeding stage(redia)> then turns into cercaria> which then goes into cyst in fish muscle

Question 36

what is human liver fluke?

Answer 36

caused by clonorchis (sinensis) and often called clonorchiasis

Question 37

how many people worldwide are infected with schistosomiasis

Answer 37

250 mil

Question 38

what is schistosomiasis caused by

Answer 38

human blood fluke (scistosoma sp)

Question 39

What is special about schistosomiasis reproduction?

Answer 39

adults are dioecious and the female lives in an external canal of male And eggs pass from circulatory system and go out through poop or pee, infected via contaminated water

Question 40

what is swimmers itch caused by

Answer 40

caused by avian schistosoma

Question 41

what class includes tapeworms

Answer 41

cestoda

Question 42

tapeworms are which kind of parasite?

Answer 42

endoparasite

Question 43

what does tapeworm consist of (head and body name)

Answer 43

head-scolex body-proglottids

Question 44

Proglottid anatomy whats inside

Answer 44

repro organs, both male and female

Question 45

Life cycle of beef tapeworm

Answer 45

human eats beef> poops out shelled larva>grass contaminated with eggs ingested by cow> cysts in muscle (measly beef)

Question 46

What other animals can have tapeworms

Answer 46

dogs cats humans any kind of meat fish poultry

Question 47

What animal does this cross section belong to

Answer 47

Common freshwater Turbellarian - Dugesia