Platyhelminthes, Nematoda, Annelida. Phylum Platyhelminthes Flatworms - Dorsoventrally flattened (top to bottom) Digestive tract has one opening (incomplete)

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Presentation transcript:

Platyhelminthes, Nematoda, Annelida

Phylum Platyhelminthes Flatworms - Dorsoventrally flattened (top to bottom) Digestive tract has one opening (incomplete) Simple nervous system No true circulatory or respiratory systems

Planaria

Planaria Regeneration

Lined Flatworm

Tapeworm parasitic

Tapeworm

Tapeworm in a Carp

Tapeworm

Tapeworms in dogs & cats Flea larvae

Flukes

Phylum Nematoda Long, tapered, cylindrical shape Longitudinal muscles

Phylum Nematoda Long, tapered, cylindrical shape Longitudinal muscles Complete Digestive system No circulatory or respiratory systems Roundworms

Parasitic Nematodes

Hookworms

Roundworm Life Cycle

Phylum Annelida Segmented worms Coelom (body cavity) Circular muscles Circulatory system (closed system)

Class Polychaeta “many bristles”

Bristle Worm

Christmas Tree Worm

Star Horseshoe Worm

Plume Worm

Social Feather Duster Worms

Medusa Worm

Class Oligochaeta “few bristles”

Earthworm Movement

Earthworms Mating

Class Hirudinea No bristles

Leech’s Mouth

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