Worms

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Worms

• Flat-Platyhelminthes
• Round-Nematoda
• Segmented-Annelida

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Flat-Platyhelminthes

• 9,000 Species
• Tissues, Organs Systems
• Bilateral Symmetry
• Respiration O2 diffuses directly to cells
• Many Parasitic
• Tape Worms-Class Cestoda
• Flukes-Class Trematoda
• Planarian
• Scavengers Predators
• Fresh water

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Round-Nematoda

• Complete digestive tract
• Tissues, Organs Systems
• Reproduce Sexually Asexually
• Most free living
• Some Parasitic
• Hook worm
• 10,00 Species

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Segmented-Annelida

• Systems
• Bilateral Symmetry
• Closed Circulatory System
• Body in Sections
• Examples
• Earth worms-help soil
• Leeches

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• www.treasuresofthesea.org.nz/bristleworms