Kingdom: Animalia

Subkingdom: Metazoa Tissue, organ or system level of

organization.

1-Dorsoventrally compresed

2-Tribloplastica

3-Aceolomate

4-Bilateral symmetry

5- Body have suckers (oral and ventral sucker)

6- alimantery canal if present incomplete

Phylum Platyhelminthes

class 1: Turbellaria

- free living in fresh,marine water,some times in soil or on plants. - 2 eye spots -eversible pharynx - digestive system (tri intestinal ceaca.)

ex: Planaria sp.

CLASS 2: TREMATODA

All parasitic Mainly in digestive tract Most with suckers Most with 2-more host life cycles Body covered with tegument. Body not segmented.

Class: Trematoda

Subclass: Digenea All are endoparasitic Life cycle contain 2 hosts ( intermediate and final

host)

FASCIOLA (Liver fluke)

Binomial name

Fasciola hepatica

Adults inhabit the bile ducts of sheep, goat, cattle and buffaloes

Schistosoma sp. (Blood fluke)

Worm pairs can live for more than 10 years in a

hostPair migrate back

against the blood flow to the mesenteries

around the intestine.

Segmented worms.

- body is divided into : scolex; neck; proglottides {immature, mature and gravid}

- No digestive system.

Class: Cestoda

StrobilaStrobilation:

Asexual process of forming segments

New proglottids are continuously formed in the neck just below the scolex

Subclass: Eucestoda(TrueTapeworms)

Adults live in the intestine of vertebrates

The body of a true tapeworm is divided into three main regions: a Scolex bearing attachment organs, a short Neck and a Strobila formed of numerous proglottids

Adults live in the intestine of vertebrates

The body of a true tapeworm is divided into three main regions: a Scolex bearing attachment organs, a short Neck and a Strobila formed of numerous proglottids

EX:Taenia saginata, Taenia solium,

Scolex ("head") with four suckers.

Proglottids have genital openings on lateral side.

TAENIA SPP

Taenia saginata

Mature segment of Taenia sp

Gravid segment

TAENIA SOLIUM

Gravid T.soliumGravid T.saginata

PHYLUM NEMATODA 1- Cylindrical worms 2- Body covered with cuticle 3- Tribloblastica 4- Pseudocoelomate 5- Sexes are separate 6- Complete digestive system

Phylum: Nematoda

Class:Secernetea

•with special sense organs(amphids&phasmids)

*Class 1: Secernentea

Order: Ascarida

Family: Ascarididae

3 lips around mouth

2 copulatory spicules in the end of male

EX: Ascaris sp

Ascaris sp . Large intestinal nematodes,

infects humans, some infects pigs ,Female lays eggs into host intestine (200,000 per day), passed out in host feces.

Ascaris sp.

oval with thick mammillated. shell. Undeveloped contain fertilized ovum