Platyhelminthes, Nematoba, Annlida

Question 1

Advances of Platyhelminthes over Cnidaria

Answer 1

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

Question 2

Advances of Nematoda over Platyhelminthes

Answer 2

• Pseudocoelom
• complete digestive tract
• reproduce sexually

Question 3

Advances of Annelida over Nematoda

Answer 3

• segmented

- True coelom

Question 4

List the digestive structure of Platyhelminthes

Answer 4

Pharynx- mouth- G.V.C- intestine

Question 5

List the digestive structure of Nematoda

Answer 5

Mouth- pharynx- intestine- anus

Question 6

List the digestive structure of Annelida

Answer 6

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

Question 7

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

Answer 7

Flat

Question 8

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

Answer 8

Clitellum

Question 9

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

Answer 9

Guinea

Question 10

Internal walls between each segment in an earthworm

Answer 10

Septa or septum

Question 11

This phylum contains unsegmented round worms

Answer 11

Nematoda

Question 12

Blood-sucking organisms which are part of phylum annelida

Answer 12

Leeches

Question 13

A body cavity which forms in more advanced animals

Answer 13

Coelom

Question 14

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

Answer 14

Gizzard

Question 15

These worms cause the condition elephantiasis

Answer 15

Filarial

Question 16

The phylum which includes worms which are flat

Answer 16

Platyhelminthes

Question 17

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

Answer 17

Nephridia

Question 18

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

Answer 18

Flukes

Question 19

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

Answer 19

Cuticle

Question 20

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

Answer 20

Setae

Question 21

Most of a tapeworms body is made up of what organs

Answer 21

Reproductive

Question 22

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

Answer 22

Hooks

Question 23

Tapeworms have no need for a what system

Answer 23

Digestive

Question 24

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

Answer 24

Hermaphrodite

Question 25

A parasitic flatworm which lives in the intestinal tract

Answer 25

Tapeworm

Question 26

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

Answer 26

Ganglia

Question 27

This phylum contains segmented round worms

Answer 27

Annelida

Question 28

Repeating reproductive segments which make up most of a tapeworms body

Answer 28

Proglottios

Question 29

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

Answer 29

Suckers

Question 30

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

Answer 30

Unsegmented

Question 31

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

Answer 31

Pharynx

Question 32

The head region of a tapeworm

Answer 32

Scolex

Question 33

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

Answer 33

Segmented

Question 34

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

Answer 34

crop

Question 35

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

Answer 35

Flame cells

Question 36

The type of circulatory system that Annelids have

Answer 36

Closed

Question 37

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

Answer 37

Ascaris

Question 38

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

Answer 38

Anus

Question 39

Crop

Answer 39

Stores food | Like stomach

Question 40

Mouth

Answer 40

Food enters, start of digestive tract

Question 41

Pharynx

Answer 41

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

Question 42

Intestine

Answer 42

Digestion and absorbing nutrients

Question 43

Gizzard

Answer 43

Grinding food

Question 44

Anus

Answer 44

Eliminates waste

Question 45

Esophagus

Answer 45

Connects mouth to crop | Food tube

Question 46

Roundworms movement

Answer 46

Longitude muscles Circular muscles Setae Parapodia (paddles)

Question 47

Longitude muscles

Answer 47

Stretch longer or shorter

Question 48

Circular muscles

Answer 48

Contract to make thicker or thinner

Question 49

Setae

Answer 49

Bristled anchor in soil, used for burrowing

Question 50

Parapodia

Answer 50

Marine worms, paddles called parapodia swimming

Question 51

Pseducoelom

Answer 51

Fluid filled body cavity

Question 52

True coelom

Answer 52

Body cavity with space for organs