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bio > Platyhelminthes, Nematoba, Annlida > Flashcards

Platyhelminthes, Nematoba, Annlida Flashcards

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Biology 101 flashcards
1
Q

Advances of Platyhelminthes over Cnidaria

A
  • 3 germ layers ecto, meso, endo
  • Bilateral symmetry
  • cephalization
  • regeneration
  • flame cells
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2
Q

Advances of Nematoda over Platyhelminthes

A
  • Pseudocoelom
  • complete digestive tract
  • reproduce sexually
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3
Q

Advances of Annelida over Nematoda

A
  • segmented

- True coelom

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4
Q

List the digestive structure of Platyhelminthes

A

Pharynx- mouth- G.V.C- intestine

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5
Q

List the digestive structure of Nematoda

A

Mouth- pharynx- intestine- anus

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6
Q

List the digestive structure of Annelida

A

Mouth- pharynx- esophagus- crop- gizzard- intestine- anus

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7
Q

These worms do not have a coelom and are therefore called acoelomates

A

Flat

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8
Q

A thickened band of segments towards the anterior end of an earthworm which secretes a mucus cocoon into which sperm and eggs are released

A

Clitellum

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9
Q

This worm grows in the appendages of its host and must be removed slowly by wrapping it around a stick

A

Guinea

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10
Q

Internal walls between each segment in an earthworm

A

Septa or septum

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11
Q

This phylum contains unsegmented round worms

A

Nematoda

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12
Q

Blood-sucking organisms which are part of phylum annelida

A

Leeches

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13
Q

A body cavity which forms in more advanced animals

A

Coelom

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14
Q

This muscular structure in the gut of the earthworm grinds food into smaller pieces

A

Gizzard

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15
Q

These worms cause the condition elephantiasis

A

Filarial

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16
Q

The phylum which includes worms which are flat

A

Platyhelminthes

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17
Q

Specialized excretory organs in segmented roundworms which filter fluid in the coelom

A

Nephridia

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18
Q

Small parasitic flatworms which live in the tissues of there hosts- like the liver and blood

A

Flukes

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19
Q

This coating on the outside of a tapeworm stops it from being digested by its host

A

Cuticle

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20
Q

Bristly, hairlike structures found on each segment of an earthworm which aid in movement

A

Setae

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21
Q

Most of a tapeworms body is made up of what organs

A

Reproductive

22
Q

Structures which helps a tapeworm “hang on” in the intestinal tract of its host

A

Hooks

23
Q

Tapeworms have no need for a what system

A

Digestive

24
Q

An organism which possesses both male and female reproductive organs is called a

A

Hermaphrodite

25
Q

A parasitic flatworm which lives in the intestinal tract

A

Tapeworm

26
Q

Instead of a brain some flatworms may have a less complicated collection of nerve cells called

A

Ganglia

27
Q

This phylum contains segmented round worms

A

Annelida

28
Q

Repeating reproductive segments which make up most of a tapeworms body

A

Proglottios

29
Q

Other structures which help a tapeworm “hang on” In the intestinal tract of its host

A

Suckers

30
Q

These roundworms have a pseudocoelom because that body cavity is only partially lined with mesodermal tissue

A

Unsegmented

31
Q

A muscular tube which extends out of a planaria worms for feeding

A

Pharynx

32
Q

The head region of a tapeworm

A

Scolex

33
Q

These roundworms have a true coelom because the entire cavity is lined with mesodermal tissue

A

Segmented

34
Q

This structure is used to store food before it goes into the gizzard of the guy of an earthworm

A

crop

35
Q

Some flatworms have these cells which aid in exertion by removing excess water from the body

A

Flame cells

36
Q

The type of circulatory system that Annelids have

A

Closed

37
Q

A parasitic Nematode which absorbs nutrients from the gut and in large numbers an partially or completely block the passage of food through the intestinal tract

A

Ascaris

38
Q

Flatworms dont have one of these which allows for unidirectional digestion which is more effective

A

Anus

39
Q

Crop

A

Stores food

Like stomach

40
Q

Mouth

A

Food enters, start of digestive tract

41
Q

Pharynx

A

Contracts and swallows food and dirt, pumps food and soil into esophagus

42
Q

Intestine

A

Digestion and absorbing nutrients

43
Q

Gizzard

A

Grinding food

44
Q

Anus

A

Eliminates waste

45
Q

Esophagus

A

Connects mouth to crop

Food tube

46
Q

Roundworms movement

A

Longitude muscles
Circular muscles
Setae
Parapodia (paddles)

47
Q

Longitude muscles

A

Stretch longer or shorter

48
Q

Circular muscles

A

Contract to make thicker or thinner

49
Q

Setae

A

Bristled anchor in soil, used for burrowing

50
Q

Parapodia

A

Marine worms, paddles called parapodia swimming

51
Q

Pseducoelom

A

Fluid filled body cavity

52
Q

True coelom

A

Body cavity with space for organs

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