PLATYHELMINTHES

Question 1

common name

Answer 1

flatworms - drosoventrally compressed

Question 2

general information

Answer 2

triploblastic- acoelomates- body cavity is absent- celluclar layer called mesenchyme or parenchyma is present, bilateral symmtery -

Question 3

Body type

Answer 3

unsegmented except taenia- segmneted proglottids var

Question 4

size range

Answer 4

few mm (10mm dugesia) - several meters of tapewom

Question 5

form of life

Answer 5

Endoparasites ; taenia solium- fasciola hepartica- schistosoma - parasites of humans
Free living- planaria (dugesia)

Question 6

digestive system

Answer 6

sac like - branching - poorly developed
absent in tape worm

Question 7

excretory system

Answer 7

branching tubes havinf bulb like cells in the end called FLAME CELLS -

Question 8

nervous system

Answer 8

network of nerves and ganglia - sensory organs in the anterior end

Question 9

respiratory system

Answer 9

absent

Question 10

circulatory system

Answer 10

absent

Question 11

nutrition source

Answer 11

parasitic - host
planaria- small animals and dead organic matter

Question 12

way of living

Answer 12

parasitic - restricted activity and free forms are motile- cillia present on ventral sides

Question 13

reproduction

Answer 13

both ways

Question 14

sexxual

Answer 14

hermaphrodite

Question 15

asexual

Answer 15

binary fission- regeneration as in planaria

Question 16

larval form

Answer 16

present sometimes

Question 17

examples

Answer 17

Dugesia - planaria
fasciola hepatica – liver fluke ( f and f)
taenia solium - tapeworm

Question 18

dugesia

Answer 18

free living
ciliated outer surface

Question 19

LIVERFLUKE

Answer 19

sheep
occasionally in human beings as well
it has SUCKERS for attachment
completes its life cycle in two hosts- a snail, sheep or a man
lives in the bile duct of the man

Question 20

taenia solium

Answer 20

human, cattle and pigs - HCP
also completes its life cycle in two hosts
the intermediate host is pig/cattle
body is ribbon like
segmented - segments called proglottids which minly contains sex organs
these segments continue to break foff and pssed out from the intestines through feaces.

Question 21

PARASITIC MODE OF LIFE (alti)

Answer 21

1. absence of epidermis- the presence of resistance cuticle
2. adhesive organs- suckers and hooks,
3. degeneration of muscular and nervous system
4. digestive system is simplified
5. complexity of life cycle - presence of 2 hosts
6. complicated rerpo systems

Question 22

reproduction

Answer 22

complicated repro systems
production of OVA in LARGE NUMBERS.

Question 23

infestation

Answer 23

uterus- zygote- embryo - bud off- cow - man’s intestines (taenia)

Question 24

TREATMENT

Answer 24

for tapeworm infection- bsides drugs- ANEMA- is also given to patients to fully remove the parasite