Lesson 4 - Anatomical Structure of Trematodes

Question 1

• aka flatworm or flukes
• resemble leaf

Answer 1

trematodes

Question 2

two suckers

Answer 2

• oral sucker
• ventral sucker

Question 3

nervous system of trematodes

Answer 3

• paired ganglia
• nerve cords

Question 4

• use for the attachment of host
• for ingesting food from host

Answer 4

oral sucker

Question 5

• or acetabulum
• secondary attachment organ
• helps trematode to stay in place

Answer 5

ventral sucker

Question 6

• muscular organ
• helps in sucking and pumping of food

Answer 6

pharynx

Question 7

• short tube
• serve as channel towards intestine

Answer 7

esophagus

Question 8

split into two (diphercated)

Answer 8

cecum

Question 9

absorb nutrients for the body

Answer 9

intestine

Question 10

collects metabolic waste from the body tissue

Answer 10

small excretory tubule

Question 11

serve as a channel that transfers waste from small excretory tubule to excretory bladder

Answer 11

collecting tubes

Question 12

stores and later expels waste towards excretory pore

Answer 12

excretory bladder

Question 13

opening where metabolic waste exits

Answer 13

excretory pore

Question 14

produces sperm

Answer 14

testis

Question 15

small ducts that transfer sperm from testes to vas deferens

Answer 15

vas efferens

Question 16

larger duct that carries the sperm towards seminal vesicle

Answer 16

vas deferens

Question 17

stores sperm before ejaculation

Answer 17

seminal vesicle

Question 18

releases seminal fluid that nourishes the sperm

Answer 18

prostate gland

Question 19

• copulatory organ of male
• where the sperm is transferred towards the genital pore
• male and female share one genital pore

Answer 19

cirrus

Question 20

protects the cirrus, seminal vesicle, and prostate gland

Answer 20

cirrus sac

Question 21

where the sperm and egg exits

Answer 21

genital pore

Question 22

produces the egg of the trematode

Answer 22

ovary

Question 23

stores the sperm that is received from the male for fertilization

Answer 23

receptaculum seminis

Question 24

• vestigial structure
• not all trematodes
• alternative route for sperm or waste

Answer 24

Laurer’s canal

Question 25

site where fertilization happens

Answer 25

ootype

Question 26

- help in egg shell formation - lubrication for egg movement

Answer 26

Mehlis glands

Question 27

stores and transports fertilized egg toward genital pore for the release

Answer 27

uterus

Question 28

produces the yolk and materials that would nourish the egg

Answer 28

vitelline

Question 29

collects the yolk from the vitelline gland and transport it to the ootype for egg formation

Answer 29

common vitelline duct

Question 30

needs two hosts to complete their cycle

Answer 30

class Digenea

Question 31

tegument could have what

Answer 31

spines or tubercles

Question 32

Morphological types of digenes

Answer 32

1. monostome 2. amphistome 3. distome 4. holostome 5. echinostome

Question 33

has oral sucker only

Answer 33

monostome

Question 34

has oral sucker and a ventral sucker

Answer 34

amphistome

Question 35

- has and oral sucker and a ventral sucker - latter is located somewhere other than the posterior end

Answer 35

distome

Question 36

body split into distinct anterior and posterior portions

Answer 36

holostome

Question 37

tegumental spines surrounding the oral sucker

Answer 37

echinostome

Question 38

- contains cilia - helps in the osmoregulation of trematodes - helps in waste removal

Answer 38

flame cell

Question 39

- live in close apposition, forming gynaecophoric canal - has oral and ventral sucker (one each)

Answer 39

Male and female copula (Schistosomes)

Question 40

where female inserts

Answer 40

gynaecophoric canal

Question 41

helps in absorption and attachment to host

Answer 41

tubercles

Question 42

has prominent tubercles

Answer 42

S. mansoni

Question 43

have fewer and smaller tubercles

Answer 43

S. haematobium

Question 44

have smooth integument and less pronounced tubercles

Answer 44

S. japonicum

Question 45

- brown-black pigment - toxic to Schistosomes

Answer 45

hemozoin