Phylum Platyhelminthes and Nematodes

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 [email protected] 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 endoparasiti c 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???