This PPT is for F.Y.B.Sc students of course I Semester I, belonging to Mumbai University of Maharashtra India. You can email at sudesh_rathod@yahoo.co.in for further query.

1. COURSE I – FIRST SEMESTER
PHYLUM PLATYHELMINTHES
Dorsoventrally flattened, bilaterally symmetrical, triploblastic and acoelomate
worms.
Prof. S D Rathod

2. Flame cell
 Excretion is
performed by flame
cells
 Digestive system is
incomplete (no
anus)

3. Class – Turbellaria
 Planarians
 Free living
 Sense organs at head region
 Eversible pharynx
 High regeneration

4. Class – Trematoda
 Oral and ventral suckers
 Endoparasitic
 example - Fasciola (Liver-fluke)

5. Class – Cestoda (class of tape worms)
 Commonly known as tapeworms since body is long
tape like.
 These have suckers and hooks for attachment.
 Tapeworms are endoparasitic and live in intestine of
various vertebrates.
 Body is pseudosegmented.

6. Taenia solium (tapeworm)

7. Pseudosegmentation

8. Taeniasis
In fish
In Dog

9. COURSE I – FIRST SEMESTER
PHYLUM - ASCHELMINTHES
CLASS - NEMATODA
Round worms, cylindrical, bilaterally
symmetrical, triploblastic, pseudocoelomate.
Digestive system complete.
Prof. S D Rathod

10. Ascaris
 Ectoderm is syncytial.
 Sexes are separate
 Females are larger
than males and are
straight. Males are
small and curved at
posterior end. They
have genital papilla
for copulation.
 Female lays about
15000 to 20000 eggs
daily

11. More about Ascaris
 Pharynx is muscular
 Sexual dimorphism

12. Ascariasis

13. So……. enjoyed???