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Zoo > Platyhelmenthes > Flashcards

Platyhelmenthes Flashcards

1
Q

Phylum- Platyhelminthes

Classes- (3)

A

Turbellaria (planarians)
Trematoda (flukes)
Cestoda (tapeworm)

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2
Q

Class Turbellaria

genus-

A

dugesia (planarians)

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3
Q

Class Trematoda

Genus-

A

fasicola (flukes)

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4
Q

Class Cestoda

genus-

A

taenia (tapeworm)

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5
Q

What kind of germ layers?

A

triploblastic

ectoderm, mesoderm, endoderm

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6
Q

do they have a coelom?

A

No, acelomate no body cavity just parenchyma

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7
Q

symmetry? cephalization?

A

bilateral

yes, obvious head end

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8
Q

Turbellaria -dugesia (planarians)

Feeding strategies

A

Evert ventral pharynx to feed,
GV cavity branches into diverticula
free living predators and scavengers

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9
Q

Turbellaria -dugesia (planarians)

Characteristics:

A

cilliated ventral side to move, only one opening,

simple life cycle, can regenerate

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10
Q

Trematoda- fasicola (flukes) and

Cestoda- taenia (tapeworm)

A

endoparasite, tough syncytial tegument, no cilia

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11
Q

Cestoda- taenia (tapeworm)

Characteristics:

A

no mouth or gut, have a scolex for hooking, made of proglottids

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12
Q

Trematoda- fasicola (flukes)

Characteristics:

A

Life cycle needs intermediate host (snail in larval stages, asexual) and definitive host (sheep liver in adult, sexual). Can be mono or dioecious

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13
Q

Trematoda- fasicola (flukes) life cycle

A

Egg> miracidium >sporocyst> rediae>(out of snaill) cercariae> metacercarial cyst >(into sheep) metacercaria

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14
Q

Cestoda- taenia (tapeworm) life cycle

A

definitive host Ingestion of worm> attaches to intestines and matures > detach proglottids into feces >pig eats the larva> (intermediate host) larva encysts in pig muscle> definitive host eats pig meat

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15
Q

Turbellaria -dugesia (planarians) cilia and Rhabdite cells

A

cillia work with Rhabdite cells to produce mucus so they have a “slime” trail

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16
Q

Turbellaria -dugesia (planarians) organ system

A

osmoregulatory - regualte body fluids like a network of tubes in parenchyma. the tubes end at the flame cell.

17
Q

protoniphridia= flame cell

A

tuft of cilia/flagella surrounded by a sieve-like structure made of microfibrils selective of certain ions.

tuft inside the cell “beats” to excrete waste

18
Q

tapeworm larva

A

oncosphere

19
Q

Intermediate host: final host

A

Sexual reproduction of endoparasites occurs in only one animal host, the final or definitive host, while asexual reproduction of the parasite can occur in the intermediate host(s) and sometimes also in the final host.

Zoo (6 decks)

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