Date post: | 11-May-2015 |
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COURSE I – FIRST SEMESTERPHYLUM PLATYHELMINTHES
Dorsoventrally flattened, bilaterally symmetrical, triploblastic and acoelomate worms.
Prof. S D Rathod
Flame cell
Excretion is performed by flame cells
Digestive system is incomplete (no anus)
Class – Turbellaria Planarians Free living Sense organs at head
region Eversible pharynx High regeneration
Class – Trematoda
Oral and ventral suckers Endoparasitic example - Fasciola (Liver-fluke)
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.
Taenia solium (tapeworm)
Pseudosegmentation
Taeniasis
In fish
In Dog
COURSE I – FIRST SEMESTER
PHYLUM - ASCHELMINTHESCLASS - NEMATODA
Round worms, cylindrical, bilaterally symmetrical, triploblastic, pseudocoelomate.Digestive system complete.
Prof. S D Rathod
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
More about Ascaris
Pharynx is muscular Sexual dimorphism
Ascariasis
So……. enjoyed???