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

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Phylum Platyhelminthes

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Presentation transcript:

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

PHYLUM Platyhelminthes Symmetry? Orientation Terms? Bilateral - Dorsal - Ventral - Anterior - Posterior

PHYLUM Platyhelminthes Size Range? 1 mm to 20 m # Species? 14,500 (BDOL) Habitat? Marine, Fresh H 2 O & even Moist Land

1 Outside? 2 Inside? 3 Middle? PHYLUM Platyhelminthes Three # Tissue Layers? Ectodermis Endodermis Mesodermis

PHYLUM Platyhelminthes # Of Classes? Three How Are They Grouped? Parasitic vs Free Living

PHYLUM Platyhelminthes 1 Turbellaria #1 ?Classes - Example? - Planaria

PHYLUM Platyhelminthes 1 Turbellaria 2 Trematoda Classes#2 ? - Example? - Fluke

PHYLUM Platyhelminthes 1 Turbellaria 2 Trematoda Classes 3 Cestoda #3 ? - Example? - Tapeworm

PHYLUM Platyhelminthes 1 Turbellaria 2 Trematoda Classes 3 Cestoda Called?Scolex Note: discs and hooks are located all around the scolex.

PHYLUM Platyhelminthes Called?

PHYLUM Platyhelminthes Gravid Proglottids These Proglottids are ??

PHYLUM Platyhelminthes Other 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?)