PHYLUM The Greek: “platys” means? “flat” + The Greek: “helmins” means? “worm” Platyhelminthes ?

PHYLUM The Greek:“platys”means?

“flat”

+The Greek:“helmins”means?

“worm”

Platyhelminthes?

PHYLUMPlatyhelminthes

Symmetry?

Orientation Terms?

Bilateral

- Dorsal

- Ventral

- Anterior

- Posterior

PHYLUMPlatyhelminthes

Size Range? 1 mm to 20 m

# Species? 14,500 (BDOL)

Habitat? Marine, Fresh H2O & even Moist Land

1 Outside?2 Inside?

3 Middle?

PHYLUMPlatyhelminthes

Three# Tissue Layers?Ectodermis

Endodermis

Mesodermis

PHYLUMPlatyhelminthes# Of Classes? Three

How Are They Grouped?

Parasitic vsFree Living

PHYLUMPlatyhelminthes

1 Turbellaria

#1 ?Classes

- Example?- Planaria

PHYLUMPlatyhelminthes

1 Turbellaria

2 Trematoda

Classes #2 ?

- Example?- Fluke

PHYLUMPlatyhelminthes

1 Turbellaria

2 Trematoda

Classes

3 Cestoda

#3 ?

- Example?- Tapeworm

PHYLUMPlatyhelminthes

1 Turbellaria

2 Trematoda

Classes

3 Cestoda Called? Scolex

Note: discs and hooks are located all around the scolex.

PHYLUMPlatyhelminthes

Called?

PHYLUMPlatyhelminthes

GravidProglottids

These Proglottids are ??

PHYLUMPlatyhelminthesOther Terms (check your book):- Cephalization - Snail (intermediate host for ?)- Schistosomiasis - Name PRIMARY host? - Flame Cells (Why named? Function?) - Ganglia- Pharynx - Tape worm life cycle- Regeneration - Scolex- Sensory Pits- Name organs made from Mesoderm?- Missing Systems? (In Cestoda?)