Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Invertebrate zoology > Platyhelminthes > Flashcards

Platyhelminthes Flashcards

1
Q

What is the literal meaning of Platyhelminthes?

(greek)

A

Platys (flat)
Helminthes (worm)
Flatworms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Body of the platyhelmintes

(think of the diagram)

A

Flatten dorsoventrally with a protuding mouth on its ventral side.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Describe its morphology

A
  • Elongated
  • no legs
  • Bilateral symmetic
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Platlyhelminthes are among the first animals to exhibit bilateral symmetry.

(true of false)

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Cephalisation

(platlyhelmintes have this)

A

differentiation of head.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How many germ layers do platlyhelminthes have?

A

3 layers - Triploblastic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Name the 3 germ layers found in Platlyhelminthes

A

Endoderm,ectoderm, mesoderm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Discribe platlyminthes coelom

(what kind to they have?)

A

Acoelom. Do not have a fluid-filled body cavity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

the mesodermal cells or mesenchyme consit of?

A

Parenchyma

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What kind of organization do platlyhelminthes have?

A

Organ level grad organisation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

which worm does not have a gut?

(starts with cest : and is a tape)

A

Cestoidea tape worms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What kind of guts do platyhelminthes have?

A

Incomeplete gut

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

describe the modes of life of the platyhelminthes

A

free-living and parasitic.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How many classes are there in platyhelminthes and name them.

A
  1. tapeworms; Cestoidea
  2. free-living flatworms;Turbellaria
  3. flukes-parasitic flat worms; monogenea
  4. flukes; Trematoda
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

describe turbellaria

A
  • freeliving below stones and marine debris
  • symbiosis with orthers
  • have cilia on epidermal calls
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What does the platyhelminthes digestive system include?

A

A pharynx
A mouth
An intestine

17
Q

What is the two type of feeding do Platyhelminthes utilizie

A

Scavengers and carnivores

(small insects, crustaceans, nematodes)

18
Q

How does turbellarian (planaria) detect food and food distance?

A

Chemoreceptors (food)
sensory cells on head (distance of food).

19
Q

What type of animal requires osmoregulation?

(what habitat do they live in?)

A

Freshwater animals

20
Q

Why does freshwater animals require osmoregulation?

A

Freshwater animals are hypertonic to their aquatic environments therefore need to osmoregulate.

21
Q

What allows for turbellarians to live in fresh water?

(starts with P and rhymes with photo)

A

Protonephridia

22
Q

What would happen to turbellarians if they had no protonephridia (flame cells)?

A

They would swell up.

23
Q

What is the name of the first kidney in platyhelminthes?

A

Protonephridia

24
Q

What does the flame cell have in it?

A

Cilia or flagella inside their cup-shaped body, that resombles a cell.

25
Q

What are the holes that flame cells excrete their waste from?

(from the word protonephridia)

A

Nephridiphores

26
Q

describe the osmoregulation and excretion in platyhelmintes.

A

The Platyhelminthes’ metabolic waste is partly eliminated through their protonephridia and body walls. This occurs mainly through their body wall. The protonephridia is their first kidney and is also known as a flame cell. The flame cells have cilia or flagella, which beat and transport fluid to the collecting duct, creating a negative pressure, which draws the fluid from the surrounding tissue to the Tubule. The tubule then is merged and opens outside of the body wall, and waste is eliminated from the mesenchyme to the nephridiphores. Microvilli are responsible for water absorption to keep bodily fluids at the correct or ideal concentration.

27
Q

What does the nervous system consist of?

(6 THINGS. WHAT ARE THEY?)

A
  1. Eyespot (Ocelli)
  2. sensory lobe (Auricle)
  3. Subepidermal Plexus
  4. Brain (Cerebal Ganglia)
  5. Longitudinal nerve chord.
  6. Latteral branches
28
Q

Where are the sensory cells connected to? Anterior or posterior?

A

Anterior end of the flatworm that interacts with the environment first.

29
Q

Where are the nerve cells concentrated in the platyhelmintes

A

The cerebal ganglia (brain)

30
Q

Auricles what are their function and where are they located?

A

At the side of the head of the tubellarians.
Have chemoreceptors concentrated in the auricles.

31
Q

Eyespots what are they

A

have dark pigments that look like a iris of a human and helps them detect light.

(pigment cups).

32
Q

Longitudinal nerve cords and latteral branches what do they do?

A

Responsible for most behavior.

33
Q

What is another word for latteral branches?

A

Commissures

34
Q

What gives the patyhelminthes its ladder structure

A

Combination of lateral branches (commissures) and the longitudinal nerve cords.

35
Q

What are the forms of locomotion in platyhelminthes?

A

Swimming (muscle contractions) and crawwing (ciliated ventral side of the organism and the flatten surface helps the worm move by crawing).

Invertebrate zoology (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions